Sales Tax Calculator
Tax & IncomeAdd sales tax to any price.
Purchase & tax rate
Enter a price above zero to see the sales tax and total.
Advanced options
Enter a price above zero to see the sales tax and total.
Know what this estimate is based on
- Jurisdiction
- United States unless the calculator explicitly says otherwise
- Rules and time period
- Tax years supported by the selected calculator
- Scope and limitations
- Educational estimate only, not a tax return or filing determination. U.S. statutory-threshold tools use USD. Confirm current law and your facts with the relevant authority or a qualified tax professional.
- Source links checked
- Jul 30, 2026
Built and regression-tested by Smart Tools Lab. It has not been individually reviewed by a licensed financial, tax, or legal professional.
How to use
- 01
Choose 'Add tax' to put sales tax on top of a pre-tax price, or 'Reverse' to pull the tax back out of a price that already includes it, then type the price.
- 02
Set your sales-tax rate, and under Advanced options stack on a county or city rate to build the exact combined rate for where the sale happens.
- 03
Add a coupon, shipping and a quantity if they apply, then read the sales tax, the total, the effective rate and a line-by-line breakdown.
Formula
Add-tax mode: combined rate = base (state) rate + local rate. The taxable amount is the price times the quantity, minus any pre-tax coupon, plus shipping if your area taxes it. Sales tax = taxable amount × combined rate, and the total = pre-tax price + shipping + sales tax. Reverse mode: a tax-included price already contains the tax, so you divide instead of multiply. Pre-tax price = tax-included price ÷ (1 + combined rate), and the tax inside is the difference between the two. Simply subtracting the rate from the gross price overshoots, because the rate was charged on the smaller pre-tax base, not on the larger total. Effective rate = sales tax ÷ pre-tax total. It equals the combined rate when everything is taxed and falls below it when an untaxed fee such as shipping rides along in the price.
Example
Three items ring up at $49.99 each, a $149.97 subtotal. A $20 coupon lowers the taxable amount to $129.97. With a 6.5% state rate and a 1.75% city rate, the combined rate is 8.25%, so the sales tax is $129.97 × 8.25% = $10.72. Add $9.99 of shipping that your state leaves untaxed, and the total is $129.97 + $9.99 + $10.72 = $150.68 — roughly $50.23 per item. Because shipping escaped tax, the effective rate across the whole $139.96 pre-tax total is 7.66%, just under the 8.25% headline rate. Running it backwards: a receipt shows $108.25 and you know the rate was 8.25%. The pre-tax price is $108.25 ÷ 1.0825 = $100.00, so exactly $8.25 of what you paid was sales tax.
Definitions
- Pre-tax price
- The price of the goods before any sales tax is added — the base the rate is applied to in add-tax mode, and the figure the calculator recovers in reverse mode.
- Tax-included price
- A price that already has the sales tax baked in, such as a receipt total. Reverse mode splits it back into a pre-tax price and the tax inside.
- Base (state) rate
- The headline statewide sales-tax percentage set by the state, before any county, city or district rate is added.
- Local rate
- An extra percentage levied by a county, city or special district that sits on top of the state rate at the place of sale.
- Combined rate
- The base rate plus every local rate added together — the single percentage that actually applies to your purchase.
- Taxable amount
- The portion of a purchase the combined rate is charged on: the goods after any pre-tax coupon, plus shipping only if your jurisdiction taxes it.
- Sales tax
- The tax charged on the purchase — the taxable amount multiplied by the combined rate.
- Effective rate
- Sales tax measured against the full pre-tax total. It dips below the combined rate whenever an untaxed item, like shipping, is part of the price.
- Reverse sales tax
- Working out the tax buried inside a tax-included price by dividing by one plus the combined rate, rather than taking a flat percentage of the total.
- Use tax
- A companion to sales tax that a buyer owes directly when a taxable item was bought without sales tax — for example from an out-of-state seller — at the same rate sales tax would have been.
Good to know
Two ways to read a price: add tax vs reverse
Every sales-tax question is really one of two questions, and the first decision this calculator asks you to make is which one you're facing. Sometimes you hold a pre-tax price — the figure on a US shelf label, a quote, or an invoice line — and you want to know what it becomes once tax is added. That's add-tax mode: the rate is applied on top, and the total climbs above the sticker. Other times you already hold the final, tax-included figure — a receipt total, a cash 'out-the-door' price someone quoted you, or a charge you need to split for bookkeeping — and you want to know how much of it was tax. That's reverse mode, and it runs the arithmetic backwards. The distinction matters because the two are not symmetric: putting tax on and pulling tax off use different formulas, and mixing them up is the single most common sales-tax mistake. Choosing the right mode up front means the rest of the inputs — rate, quantity, coupon, shipping — all behave the way you expect, and the headline figure answers the question you actually asked. If you're a shopper checking what a purchase will cost, you want add-tax mode. If you're an accountant, a freelancer logging expenses, or anyone staring at a gross total that has to be broken apart, you want reverse mode. The calculator relabels its fields and its main result as you switch, so the pre-tax price, the tax, and the total are always shown in terms that fit the direction you're working. Getting comfortable moving between the two is the whole game: most real tasks are just one of these questions wearing different clothes.
The reverse-tax trap: why you divide, not subtract
The most counterintuitive part of sales tax is undoing it. Suppose a receipt reads $108.25 and you know the combined rate was 8.25%. The tempting move is to take 8.25% of $108.25, which gives about $8.93 — and it's wrong. The reason is subtle but important: the tax was never charged on $108.25. It was charged on the smaller pre-tax price, and the total is what you get after adding it. To walk that backwards you have to divide, not multiply. Dividing $108.25 by 1.0825 returns $100.00, the genuine pre-tax price, and the tax is simply the $8.25 difference. The general rule is pre-tax price equals the tax-included price divided by one plus the rate, with the rate written as a decimal. The flawed subtraction method always overstates the tax, and the error grows with the rate: at 5% the two approaches are close, but at 20% the gap becomes glaring. This is exactly the calculation reverse mode performs for you, so you never have to recall the formula under pressure. It comes up more often than people expect. A contractor quoted an all-in cash price needs to separate the tax for their books; a manager reconciling a corporate card sees only gross totals; a shopper comparing a tax-included foreign price against a US plus-tax price has to convert one into the other to judge them fairly. In each case, dividing by one plus the rate is the move, and treating the gross figure as if the rate applied to it is the trap. Once you internalise that adding tax multiplies while removing tax divides, reverse calculations stop being mysterious — and you'll spot the over-subtraction error whenever someone makes it.
Stacking a combined rate from state, county and city
In much of the world there is one national consumption-tax rate, but in the United States there is almost never a single number. Instead the rate you pay is assembled in layers. A state sets a base rate; counties add their own; cities pile on more; and special-purpose districts — for transit, stadiums, tourism, or economic development — can each tack on a fraction of a percent. Add them together and you get the combined rate, the only figure that matters at the register. Because these layers vary independently, the country has thousands of distinct combined rates, and they don't follow tidy lines: two neighbourhoods on opposite sides of a street can pay different totals if a district boundary runs between them. That's why this calculator keeps the base rate separate from an additional local rate. Enter the state rate in the main field, then open Advanced options and add the stacked county, city, and district portion as a single local figure; the tool sums them and applies the total. If you already know the all-in rate that a point-of-sale system would charge, just enter it as the base rate and leave the local field at zero — either path lands on the same answer. The practical lesson is to be specific about location. A rate looked up for a state capital can be wrong for a suburb twenty minutes away, which is why professional rate-lookup tools key on full addresses or ZIP+4 rather than city names. When a total seems off, a mismatched combined rate is the usual culprit, and most often it's a forgotten local layer quietly pushing the real rate a point or more above the headline state figure you remembered.
Where a sale is taxed: sourcing and remote sellers
A second question hides behind every sale: whose rate applies — the seller's or the buyer's? Jurisdictions answer this with sourcing rules. Under destination sourcing, the rate is set by where the customer takes possession of the goods, which is why an online order is almost always taxed at your shipping address rather than the warehouse it left. Under origin sourcing, the rate is fixed by the seller's location, so an in-store purchase is taxed where the shop sits. Many states blend the two, applying origin rules to in-state sales and destination rules to sales that cross a line. For a shopper, the upshot is that your own address usually decides the rate on remote purchases, so that's the combined rate to enter here. The shift toward destination-based taxation of remote sales is recent. After a landmark 2018 court ruling, states gained the power to require out-of-state sellers to collect tax once their sales into the state cross a revenue or transaction threshold, even with no local store or warehouse. Large online platforms then took much of the work onto themselves, collecting and remitting for the smaller sellers they host. These days, sales tax shows up on a far larger share of online orders than it would have ten years ago. But coverage still isn't universal: smaller or newer sellers below a state's threshold may not collect, and when tax isn't charged on a taxable item the obligation doesn't vanish — it simply moves to the buyer as use tax. Knowing which rate governs your purchase, and entering that combined rate, is what makes an estimate match the figure you'll actually be charged or, in the gaps, the figure you'll owe yourself.
Use tax: the bill nobody mentions
Use tax is the quiet twin of sales tax, and most people have never knowingly paid it even when they owed it. The idea is deliberate and simple: a state doesn't want residents dodging tax just by buying from somewhere that doesn't collect it. So whenever you acquire a taxable item and no sales tax was charged — a gadget from an out-of-state seller below the collection threshold, something bought on a tax-free trip and brought home, equipment purchased for resale and then kept for personal use — you generally owe use tax to your home state at the same rate sales tax would have been. It's the mechanism that keeps a local shop, which must charge tax, on a level footing with a distant seller that doesn't. For individuals, use tax most often surfaces as a line on the annual state income-tax return, where you're asked to report untaxed out-of-state purchases; some people estimate it, others keep receipts. For businesses it's a bigger deal: companies routinely owe use tax on supplies and equipment they bought without tax and then consumed rather than resold, and auditors look hard for exactly these gaps. Because the rate is identical to your sales-tax rate, this calculator doubles as a use-tax estimator — enter the purchase price and your combined rate in add-tax mode, and the tax figure it returns is the use tax you'd owe on that item. Enforcement is uneven, and small personal purchases often go unreported in practice, but the legal obligation is real and the logic is worth understanding. If sales tax wasn't collected on something taxable, the tax didn't disappear; it just became your job to remit.
What's actually taxable: goods, food, services and digital
A rate is only half the story; the other half is what the rate applies to. Sales tax falls on a defined base of taxable goods and certain services, and the edges of that base are where most of the complexity lives. Tangible goods — electronics, furniture, a restaurant meal — are the clear core, yet even there exceptions abound. Many states exempt unprepared groceries or tax them at a reduced rate, reasoning that a flat tax on food hits lower-income households hardest; prescription medicine is widely exempt while over-the-counter remedies often aren't; and clothing is fully taxed in some states, exempt in others, and exempt only below a price threshold in a few. Services are a moving target. Historically most states taxed goods and few services, but as spending shifted toward services, more of them — repairs, cleaning, personal care, some professional work — have been pulled into the base, unevenly and state by state. Digital products are the newest frontier: streaming subscriptions, downloaded music and software, e-books, and software-as-a-service are taxed in some states and untouched in others, sometimes under rules written before the products existed. The consequence for any estimate is that you cannot assume the standard goods rate applies to everything. When something is exempt, drop the rate to 0% and the tool returns a tax-free total; when a reduced rate applies to it, type that figure in place of the standard one. Goods bought to resell are exempt as well, since the tax is meant to land once at the final sale rather than at every step of a supply chain, and businesses document that with resale certificates. Pinning down whether your specific item is taxable, and at what rate, is often the difference between a useful estimate and a misleading one.
Coupons, rebates and trade-ins shift the taxable base
Discounts seem straightforward until tax enters the picture, because not every price cut affects the taxable base the same way. A store coupon or an advertised percentage-off sale reduces the price the retailer charges, so tax is figured on the lower, discounted amount — that's why this calculator subtracts your coupon before applying the rate, trimming both the taxable amount and the tax with it. A manufacturer's rebate behaves differently in many states. Because the store still collects its full price and the manufacturer reimburses you separately, the taxable amount is often the price before the rebate, meaning you pay tax on money the rebate later hands back. Trade-ins add another twist: when you trade an old car or device toward a new one, several states tax only the difference between the new item's price and the trade-in credit, which can save a meaningful sum on a large purchase, while other states tax the full price regardless. Loyalty points, gift cards, and store credit generally aren't discounts at all for tax purposes — they're a method of payment, so tax applies to the full price and the points or card simply cover part of the bill. The throughline is that tax follows the seller's actual selling price, and the real question is always whether a given reduction lowers that price or merely changes who ultimately pays it. When you model a deal here, treat a store coupon or sale as a pre-tax discount, but be careful with rebates and trade-ins: if your state taxes the pre-discount price, leave the coupon field empty and enter the full amount so the estimate matches what you'll actually be charged. Small distinctions like these are easy to overlook and can move the tax by more than you'd expect on a big-ticket buy.
Shipping, handling and bundled charges
Whether shipping is taxable is one of the most location-dependent rules in sales tax, and it catches both shoppers and small sellers off guard. The common principle is that a delivery charge takes on the tax status of what it's delivering and how it's billed. When shipping is stated separately on the invoice, is genuinely optional, and carries the goods to the buyer, many states leave it untaxed. When it's folded into the item's price, mandatory, or labelled 'shipping and handling,' those same states often tax the whole charge — and the handling portion is treated as taxable more frequently than pure freight, because handling is seen as part of preparing the sale rather than transporting it. A few states tax delivery on taxable goods in nearly all cases, and a few exempt it in nearly all. This calculator gives shipping its own field and a switch for whether it's taxed, so you can match whichever rule applies where you are. Turn taxation off and the fee is added to the total without any tax; turn it on and the fee joins the taxable base alongside the goods. There's a useful side effect to watch in the results: when shipping is untaxed, it pads the pre-tax total without adding any tax, so the effective rate the tool reports drops below your combined rate. That's not a bug — it's the honest picture of how much of your total was actually tax. For a seller, getting the shipping rule right matters at scale, because consistently mis-taxing freight across thousands of orders is exactly the kind of pattern an audit surfaces. For a shopper, it mostly affects whether the final total matches your mental estimate, and the switch lets you check it both ways in seconds.
Pennies and rounding: why your receipt may differ
Sales tax almost never lands on a clean number, and how the fractions of a cent are handled is a small detail with a surprisingly tangled history. The modern norm, and what this calculator does, is to compute the tax on the full transaction and round the result to the nearest cent. That single rounding step is usually all there is to it, and it keeps the math intuitive: tax the whole basket once, round once, done. But it wasn't always so. For decades many states published bracket schedules — printed tables that told a cashier exactly how much tax to charge for each small range of prices — and those brackets rounded tax up at fixed breakpoints, sometimes per item rather than per receipt. A few jurisdictions still permit or require bracket-based collection, and some retailers compute tax line by line and round each line before summing. The upshot is that two perfectly correct methods can disagree by a penny or two on the same purchase, which is why a real receipt can differ slightly from any estimate, including this one. The differences grow with the number of line items: round fifty items individually and the accumulated rounding can drift a few cents from rounding the basket as a whole. None of this changes the rate or the substance of what you owe — it's purely about the last fraction of a cent — but it's worth knowing so a one- or two-cent mismatch doesn't send you hunting for a mistake that isn't there. When you're budgeting or splitting a bill, treat the calculator's figure as accurate to the cent for the transaction as a whole, and expect a real register, with its own rounding convention, to occasionally round the final digit differently.
Budgeting with the real, after-tax price
The most useful habit sales tax can teach is to think in after-tax totals, because a pre-tax sticker only ever tells you part of the price. On a coffee the gap is trivial; on a large purchase it's real money. Furnish a room for $5,000 at an 8% combined rate and you've added $400 you actually need on hand. The effect is starkest on big-ticket items, and cars are the classic example: sales or use tax on a vehicle is often one of the largest single tax payments a household makes outside of income tax, and because it's charged on the purchase price it scales directly with how much you spend. Building the tax into your plan from the start — rather than discovering it at the register or the title office — is the difference between a budget that holds and one that comes up short. The effective-rate figure this calculator reports is a budgeting tool in its own right. When part of your total is untaxed, your effective rate sits below the headline combined rate, so the real bite is smaller than the nominal number suggests; when everything is taxed, the two match. Comparing the after-tax total across locations is also the only fair way to shop when rates differ, since a lower shelf price under a higher combined rate can lose to a higher price under a lower one. Use the rate-comparison table to see the same purchase at a range of combined rates at a glance — handy when you're weighing where to make a major buy or estimating the swing a local rate adds. Treat every estimate here as a close, educational guide for planning, not a substitute for the exact figure a retailer or tax authority will give you, and let the after-tax total, not the sticker, anchor your decisions.
Frequently asked questions
How do I add sales tax to a price?
Keep the calculator in 'Add tax' mode, enter the pre-tax price, and set the rate. The sales tax is the price times the rate, and the total is the price plus that tax. A $100 item at 7.25% carries $7.25 of tax for a $107.25 total. If a county or city rate also applies, add it under Advanced options so the combined rate is exact.
How do I find the tax already included in a price?
Switch to 'Reverse' mode and enter the tax-included price. The calculator divides by one plus the combined rate to recover the pre-tax price, then shows the tax as the difference. On a $108.25 total at 8.25%, the pre-tax price is $100.00 and $8.25 was tax.
Why can't I just subtract the rate to reverse the tax?
Because the rate was applied to the smaller pre-tax price, not to the larger total. Taking 8.25% of a $108.25 total gives $8.93, which is too high. Dividing by 1.0825 instead returns the true $8.25. The bigger the rate, the bigger the gap between the two methods, which is why reverse mode divides rather than subtracts.
What's the difference between the state rate and the combined rate?
The state (base) rate is set statewide. The combined rate adds any county, city and special-district rates on top, and that total is what you actually pay. Two addresses in the same state can have different combined rates, so the local-rate field lets you match the exact spot where the sale happens.
Is a discount applied before or after tax?
Store coupons and percentage-off sales are normally taken off first, so tax is charged on the lower price. This calculator subtracts your coupon from the pre-tax amount before applying the rate, which trims both the taxable amount and the tax. Manufacturer rebates are different in many states — the tax is often based on the price before that rebate.
Is shipping taxable?
It depends on the state, and often on how the charge is presented. Several states tax shipping when it is bundled with a taxable item but exempt it when it is stated separately and is genuinely optional. Use the 'Tax the shipping fee?' switch to model either rule; when shipping is left untaxed, you'll see the effective rate slip below the headline rate.
What is use tax, and might I owe it?
Use tax is the mirror image of sales tax: when you buy a taxable item without paying sales tax — say from an out-of-state or online seller that didn't collect it — you generally owe use tax to your own state at the same rate. Many people overlook it, but it's a real obligation, and the rate to enter is simply your combined sales-tax rate.
Are groceries and medicine taxed?
Often not, or at a reduced rate. Many states exempt unprepared groceries and prescription drugs to ease the load on essentials, while prepared food and over-the-counter items may still be taxed. When an item is fully exempt, enter 0% and the total comes back tax-free; when a reduced rate applies, use that figure rather than the standard one.
Are digital products and services taxed?
Increasingly, yes, but it varies widely. Some states tax streaming subscriptions, downloaded software and software-as-a-service, while others tax few services at all. Because there's no universal rule, enter the specific rate your state applies to that product or service rather than assuming the goods rate carries over.
How is sales tax different from VAT?
Sales tax lands a single time, at the final retail checkout, and the shopper alone carries it. A value-added tax instead takes a slice at every link in the chain, letting each business credit back what it already paid on its own inputs, so only the value it adds is taxed at that step. A consumer can end up paying a comparable amount either way, but the collection plumbing is completely different — reach for the dedicated VAT calculator to model a GST or VAT regime properly.
Why did two stores charge different tax on the same item?
Almost always because the combined rate differs by location. A purchase a few miles away can fall under a different city or county rate even within the same state, and online orders are usually taxed at your delivery address. Match the exact rate by adding the local component in Advanced options.
Does the calculator handle sales-tax holidays?
Indirectly. During a tax holiday, qualifying items are tax-free or taxed at a reduced rate for a limited window. There's no dedicated holiday switch, but you can mimic one: enter 0% for a fully exempt item, or type the reduced rate that applies during the event.
How is sales tax rounded at the register?
Most retailers compute the tax on the full transaction and round the result to the nearest cent, which is what this calculator shows. A few places historically used bracket schedules that rounded per item, so a real receipt can differ by a penny or two from any estimate — including this one.
What is the effective rate, and why is it below my rate?
The effective rate is the tax measured against everything you pay before tax, including untaxed charges. When shipping or another fee isn't taxed, it pads the pre-tax total without adding tax, so the tax is a smaller slice of the whole and the effective rate lands under the combined rate.
Can a coupon be larger than the price?
If you enter a coupon bigger than the purchase, the calculator caps it at the price so the taxable amount can't go negative, and flags that it did. In reality a coupon can only reduce a bill to zero; any excess value is simply lost rather than paid back as tax.
Can I use this outside the United States?
Yes. The calculator never assumes a particular jurisdiction — you supply the rate. Enter your local sales-tax, GST or consumption-tax percentage and it adds or extracts the tax the same way. For staged value-added systems, though, the VAT calculator models the input-credit mechanics more closely.
Is this sales-tax estimate official?
No. It's an educational estimate. Real rates, taxable-item rules, exemptions and rounding vary by state, county and city and change over time, and special cases abound. Treat the result as a close guide for budgeting, not as legal, financial or tax advice, and confirm specifics with the relevant tax authority or a professional.