Sales Tax Compounding and Reverse

Pre-tax / post-tax / tax with combined state + local rate. Reverse from a receipt total.

Run the calculator

Formula and source

Forward: tax = pre_tax * (rate1 + rate2). Reverse: pre_tax = post_tax / (1 + rate1 + rate2).

Arithmetic. No live rate lookup; user supplies state and local rates.

Audience

This tile is built for accounting and the adjacent professions in the Accounting, Tax, and Small-Business group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.

Related tools

Posture

Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.