Sales Tax Calculator
sales tax with state and local rates combined
Calculate sales tax with state + local rates. See total price, tax, and combined rate. Enter pre-tax price to see total including tax and tax amount.
What this tool does
Enter a pre-tax price along with state and local tax rates to see your total cost including tax, the tax amount itself, and the combined effective rate across both levels. The calculator layers state and local rates together, then applies this combined percentage to your original price. Results shift most when the pre-tax price changes or when local rates differ significantly from state rates. This tool works for any jurisdiction where sales tax applies at multiple levels. A typical scenario involves checking out at a retailer in a region with both state and local sales taxes, or comparing costs across different locations with varying rate structures. Note that the output shows what the total cost and tax burden would be under the rates you enter—it does not account for exemptions, special cases, or tax holidays that may apply in specific regions or for particular product categories.
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Formula Used
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Calculations or display — let us know.
Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
Sales Tax Varies Wildly
sales tax combines state (0-7.25%), county, city, and special-district rates. Total combined rates range from 0% (Alaska state, Delaware, Montana, New Hampshire, Oregon) to over 10% (Mobile AL). No federal sales tax exists.
What Is and Is Not Taxed
Most goods are taxed; services vary by state. Groceries are often tax-exempt or taxed at reduced rate. Prescription drugs usually exempt. Clothing exempt in some states (New Jersey, Minnesota, Pennsylvania, Vermont). Online purchases now subject to tax based on delivery address post-Wayfair 2018 decision.
Quick example
With pre-tax price of 100 and state rate of 6 (plus local rate of 2), the result is 108.00. Change any figure and watch the output shift — it's often more useful to see the pattern than to memorise the formula.
Which inputs matter most
You enter Pre-Tax Price, State Rate, and Local Rate. Not every input has equal weight. Adjusting one input at a time toward extreme values shows which ones move the result most.
What's happening under the hood
Combines state and local rate, applies to pre-tax price. Most states allow local add-ons; Alaska has zero state rate but local rates apply. The formula is listed in full below. If the number looks off, you can retrace the calculation by hand — that's the point of showing the working.
Why run the calculation
Utility bills creep. Small annual increases stack into meaningful differences over a decade. Running this once a year and switching providers when the gap widens is one of the easiest ways to keep household costs in check.
What this doesn't capture
Usage varies month-to-month; tariffs change; discounts come and go. The figure here is a clean baseline — your actual annual bill will fluctuate around it. Use the calculation to benchmark providers, not as a prediction of a specific bill.
Sales tax calculation indicates 108.00 total price.
Inputs
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
This calculator computes the total sales tax by combining state and local tax rates, then applying the sum to your pre-tax price. The calculation takes your entered price and multiplies it by one plus the combined tax rate (expressed as a decimal). For example, a state rate of 6% and local rate of 2% combine to 8%, which is applied to the full pre-tax amount. The model assumes a single, uniform tax rate applies to the entire purchase and does not account for category-specific exemptions, variations in what items are taxable, or differences in how certain jurisdictions calculate compounding taxes. Results show the tax amount and total price due.
References
Frequently Asked Questions
Which states have no sales tax?
Are groceries taxed?
How do I find my local rate?
Why does the same state rate sometimes produce different totals in different cities?
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