Business tax / Free financial tools

Sales Tax Add & Remove Calculator

Add tax to a net price or extract tax already included in a total. Use the rate that applies to your transaction.

USD • Custom transaction rate · Instant results · No sign-up

Enable JavaScript to use this interactive calculator. The calculation method and assumptions are explained below.

How this calculator works

Tax added = net price × rate. Tax-inclusive total = net × (1 + rate). To remove included tax, divide the gross total by (1 + rate). This is the US sales-tax version of the document's VAT/GST arithmetic tool.

Planning estimate only. Review the assumptions alongside the result before using it for a tax, financing or business decision.

Common questions

Does this find my local tax rate?

No. Enter the correct combined state and local rate. Product taxability, exemptions and marketplace rules can change the applicable treatment.

Can I use different rates?

Run each transaction or rate group separately. Compare A and B to see the effect of two rates; do not average rates across unlike taxable items.

Put your numbers into context.

A calculator can help you ask better questions. Tell ZTax what you are planning and we will discuss the records, scope and support you need.

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