Colorado sales tax calculator
The Colorado state sales tax rate is 2.9%. City, county and special-district taxes stack on top, so set the combined rate if you know it. A low state rate with unusually high and fragmented local rates.
- Tax added
- 2.90
- Total for the quantity
- 102.90
- Price before tax, working backwards
- 104.23
- Tax inside a tax-inclusive price
- 3.02
- Tax as a share of the total
- 2.8183 %
- Multiply the net price by this
- 1.029 000
Show the working
- Price before tax = 100
- Sales tax rate = 2.9
- Or a price that already includes tax = 107.25
- Quantity = 1
- Tax added = 100 * 2.9 / 100 = 2.9
- Total with tax = 100 + 2.9 = 102.9
- Total for the quantity = 102.9 * 1 = 102.9
- Price before tax, working backwards = 107.25 / (1 + 2.9/100) = 104.227
- Tax inside a tax-inclusive price = 107.25 - 104.227 = 3.022 59
- Tax as a share of the total = 102.9 > 0 ? 2.9 / 102.9 * 100 : 0 = 2.818 27
- Multiply the net price by this = 1 + 2.9/100 = 1.029
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- tax = price x rate
- total = price x (1 + rate)
- to remove tax: net = gross / (1 + rate), never gross x (1 - rate)
Removing a tax is division, not subtraction. Taking 7.25% off a tax-inclusive price undercharges you every time.
Rates change and local additions vary by address. Treat the prefilled rate as a starting point and check the current combined rate for the exact jurisdiction.
A low state rate with unusually high and fragmented local rates.
Frequently asked
What is the sales tax rate in Colorado?
The state base rate is 2.9%, before any city, county or district additions.
How do I work out the price before tax?
Divide the tax-inclusive price by 1 plus the rate. At 2.9% that means dividing by 1.0290.
Where the numbers come from
- State base rates as published by state revenue departments; local additions are not included.