Sales Tax Calculator — Colorado
Work out the sales tax on any purchase using your state's rate plus the average local add-on — and see why five states charge nothing at all Figures shown for Colorado.
Provisional rates. These rates have not yet been re-verified against each state revenue department.
Colorado
Local city and county rates stack on top of the state rate, so the exact figure depends on the address of the sale. The average shown is context, not a quote.
One purchase, three layers of tax
An American sales tax receipt usually hides a stack: the state base rate, plus a county rate, plus a city rate, sometimes plus a special district funding a stadium or transit line. The shelf price includes none of them, which reliably startles visitors from countries where the sticker is the price.
This calculator splits the state’s share from the local average so you can see who is actually charging what. If you know the exact combined rate for your address — it is printed on every receipt — enter it in the override field and the answer stops being an average and becomes your number.
The five no-tax states, with an asterisk
Alaska, Delaware, Montana, New Hampshire and Oregon charge no statewide sales tax. The asterisk is Alaska: its municipalities can and do levy their own, so “no sales tax” is only reliably true in the unincorporated areas.
The interesting pattern is that no-tax states are not low-tax states — they simply collect elsewhere. New Hampshire has some of the highest property taxes in the country; Oregon leans on one of the higher income taxes, which you can see in your take-home pay. States need roughly similar money; they just choose different pockets.
Where the highest combined rates live
The heaviest combined burdens are not where most people guess. Louisiana, Tennessee, Arkansas, Washington and Oklahoma routinely top the combined-rate table, because aggressive local stacking matters more than the state base. Tennessee is the sharpest example of the trade: nearly the highest sales tax in the nation, and no tax on wage income at all.
California holds the highest state base rate, but its average combined rate sits below several southern states once locals are counted.
Big purchases deserve the override
On everyday spending, the difference between your city’s rate and the state average is pocket change. On a $40,000 car, a $2,000 appliance or a contractor’s materials bill, a single percentage point is real money — and vehicle purchases are usually taxed at the rate of where you register, not where you buy, so the dealership’s location does not save you anything.
For the authoritative rate at any address, every state revenue department runs a lookup tool; the Federation of Tax Administrators links to each of them.
How this is calculated
State tax = price × state base rate Local tax = price × (combined rate − state rate) Total tax = price × combined rate Total price = price + total tax The combined rate uses your state's average unless you enter the exact rate for your address.
Frequently asked questions
- Which states have no sales tax?
- Five — Alaska, Delaware, Montana, New Hampshire and Oregon, often remembered as "NOMAD" minus the second N. Alaska is the asterisk. It has no statewide tax, but many of its cities and boroughs levy their own, so purchases there are not always tax-free.
- Why doesn't the total match what my store charges?
- Local rates. Most states let cities, counties and special districts stack their own sales taxes on the state base, so the true rate depends on the address of the sale. The statewide average here is context — for the exact figure, use the rate printed on any local receipt via the override field.
- Are groceries taxed?
- It varies widely. Most states fully exempt groceries, some tax them at a reduced rate, and a few tax them at the full rate. Prepared food, candy and soda are frequently carved out and taxed even where groceries are exempt. Prescription drugs are exempt almost everywhere.
- Do I owe sales tax on online purchases?
- Generally yes. Since the Supreme Court's Wayfair decision in 2018, large out-of-state sellers must collect the tax for your delivery address. If a seller does not collect it, most states technically owe you a matching "use tax" on the purchase, though enforcement against individuals is rare.
- Why do people cross state lines to shop?
- Border geography makes rates real. A resident of Vancouver, Washington — combined rate near 9% — can drive ten minutes to Portland, Oregon and pay zero. On big-ticket items the round trip pays for itself, which is why no-tax states cluster retail along their borders.