How to Calculate a Discount and the Final Sale Price
"30% off" is easy; "extra 20% off sale price" and "buy one, get one 50% off" are where people get tripped up. The formulas for every kind of discount, with examples.
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North Carolina Sales Tax by County: 6.75% to 8.25%
North Carolina's 4.75% state sales tax becomes 6.75% to 8.25% once county and transit taxes are added. Rates for the biggest cities and how to find any county.
Washington Sales Tax by City: Why Rates Run From 7.6% to 10.7%
Washington charges a 6.5% state sales tax, and local taxes push the combined rate to between 7.6% and 10.7%. Rates for major cities, why they differ, and how to find yours.
How to Calculate Sales Tax (and Work Back From a Total)
Sales tax is one multiplication, but working backward from a receipt or adding local rates trips people up. The formulas, with real state and city examples.
Which States Have No Sales Tax?
Five states charge no statewide sales tax, but "no sales tax" doesn't always mean no tax at the register. Here is the list, the catches, and the states with the highest rates.