Sales Tax Calculator (United States)

Type your combined state and local sales tax rate to add tax to a price, or work back from a total to the price before tax.

Bookkeeping Formula Reference

Every formula used by these calculators. They match the FNSACC323 Perform financial calculations unit.

Tax
GST: Add
Price inc GST = Price ex GST × 1.1
e.g. $100 × 1.1 = $110
GST: Remove
Price ex GST = Price inc GST ÷ 1.1
e.g. $110 ÷ 1.1 = $100
GST: Find Amount
GST = Price inc GST ÷ 11
e.g. $110 ÷ 11 = $10
Business
Markup
Selling Price = Cost + (Markup% × Cost)
e.g. Cost $50, Markup 20% → SP = $50 + ($50 × 0.20) = $60
Profit Margin
Selling Price = Cost ÷ (1 − Margin%)
e.g. Cost $50, Margin 20% → SP = $50 ÷ 0.80 = $62.50
Sales Commission
Commission = Rate% × Total Sales
e.g. $10,000 sales at 5% → Commission = $500
Simple Interest
Simple Interest
Interest = Principal × Rate × Number of Periods (T)
I = P × R × T
e.g. $300 at 2% for 1 year → I = $300 × 0.02 × 1 = $6
Total Value / Total Repayable
Total = Principal + Interest
e.g. $300 + $6 = $306
Compound Interest
Future Value (Compound)
FV = PV × (1 + i/n)^(n×t)
PV = present value, i = annual rate, n = periods/year, t = years
Present Value
PV = FV × (1 + i/n)^(−n×t)
How much to invest now to reach a future target
Loan Repayment
Repayment = P × [rp × (1 + rp)^N] ÷ [(1 + rp)^N − 1]
rp = rate per period, N = total periods
Depreciation
Straight Line: No Residual
Depreciation = Total Cost ÷ Effective Life
e.g. $11,000 ÷ 5 yrs = $2,200 per year (same each year)
Straight Line: With Residual
Depreciation = (Total Cost − Residual) ÷ Effective Life
e.g. ($11,000 − $1,000) ÷ 5 = $2,000 per year
Diminishing Value: Rate
Rate % = 200% ÷ Effective Life
e.g. 200 ÷ 12 yrs = 16.67%
Diminishing Value: Depreciation
Depreciation = Rate % × Carrying Amount
Applied to the reducing book value each year, bigger early, smaller later

GST Calculator (Australia)

GST Rate: 10%
$

Results

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Markup / Profit Margin

Markup calculates profit as a percentage of the cost price. Profit Margin calculates profit as a percentage of the selling price.

SP = Cost + (Markup% × Cost)
$
%

Results

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Sales Commission

Commission = Rate% × Total Sales
$
%
$

Results

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Break-Even Point

Units = Fixed Costs ÷ (Price − Variable Cost)

Fixed Costs stay the same no matter how much you sell (e.g. rent, insurance). Variable Cost is what it costs to make or deliver one single unit (materials, packaging, per-item shipping) — it goes up and down with sales, unlike fixed costs. Selling Price is what you charge per unit.

$
$
$

Results

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Simple Interest

I = P × R × T
$
%

Results

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Compound Interest

FV = PV × (1 + I)ᴺ
$
%
$

Results

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Present Value

PV = FV × (1 + I)⁻ᴺ
$
%

Results

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Depreciation

Depn = (Cost − Residual) ÷ Life
$
$

Results

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Time to Decimal

Decimal Hours = Hours + (Minutes ÷ 60)
hrs
min

Results

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Pay Calculator (Before Tax)

Gross Pay = (Rate × Ord. Hours) + (Rate × OT × OT Hours)
$

Results

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GST / VAT / Sales Tax Calculator

Rate: 15%
%
$

Results

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How sales tax works

The United States has no national sales tax. Each state sets its own rate, and counties and cities often add their own on top, so the rate depends on where the sale happens. Enter the combined rate for your location in the rate box.

Total = Price × (1 + sales tax rate)
Price before tax = Total ÷ (1 + sales tax rate)

Example. A $60 item at a combined rate of 8.25%: $60 × 1.0825 = $64.95. The sales tax is $4.95.

Working backwards from a $64.95 receipt: $64.95 ÷ 1.0825 = $60.

States with no state sales tax

Alaska, Delaware, Montana, New Hampshire and Oregon do not charge a statewide sales tax, although some local areas in Alaska charge their own.

Finding your rate

Your state’s department of revenue publishes current state and local rates, usually with a lookup by address or ZIP code. Use the rate for where the customer receives the goods.

Rates change and many items are taxed differently or exempt. Check your state’s rules before relying on a figure.

Frequently asked questions

How do I calculate sales tax?

Multiply the price by the tax rate as a decimal. At 7%, the tax on $50 is $50 × 0.07 = $3.50.

How do I work out the price before sales tax?

Divide the total by 1 plus the rate. At 7%, a $53.50 total is $53.50 ÷ 1.07 = $50 before tax.

Is there a federal sales tax in the US?

No. Sales tax is set by states and local governments, so the rate varies by location.

Tax calculators for other countries