Solve Sales Tax
Enter the pre-tax price and tax rate to calculate tax and total. To remove tax from a tax-inclusive amount, use Pre-tax = Total Γ· (1 + Rate).
Formula: Tax = Price Γ Rate; Total = Price + Tax
Keep rates, balances, prices, and time periods on the same basis. An annual rate should not be combined with a monthly period unless the formula accounts for that conversion.
Check the final amount against the starting figure and rate. A large unexpected difference often points to a period or percentage entered in the wrong form.