Idaho Sales Tax Calculator (State & Local Rates)

Ring up a purchase almost anywhere in Idaho and the receipt starts with the state's 6.00% statutory sales tax rate before anything local gets added on. Local jurisdictions are technically permitted to add their own surtaxes, but few do so at scale: the statewide average local add-on is a thin 0.03%, which keeps the average combined rate of 6.03% only marginally above the 6.00% base rate.

That leaves Idaho a bit below the roughly 7.3% average combined rate seen across the states that levy a general sales tax. Retailers operating storefronts in multiple Idaho jurisdictions have to track which local rate applies at each location, since the state does not collect a single uniform combined rate. It sets the 6.00% floor and lets local governments decide what, if anything, to add above it. Point-of-sale systems configured for Idaho generally pull the applicable rate by ZIP code or street address rather than applying one number statewide, which is the same logic this calculator uses when it defaults to the statewide average.

Idaho is effectively a single-rate state. The statutory rate is 6.00% and the average local add-on is 0.03%, which is close enough to nothing that a $1,000 purchase produces $60.30 of tax and only 30 cents of it is local. That tiny average exists because Idaho restricts local sales taxes to resort cities and a small number of auditorium districts, places like Sun Valley and McCall, rather than allowing them statewide. Idaho also offers a grocery credit on the income tax return instead of exempting food at the register.

With the local term this small, the combined rate is essentially the state rate:

The calculation runs as follows:

1. Establish the taxable base. The calculator uses the pre-tax price exactly as entered.
2. No item-level exemption filtering. Groceries are taxable in Idaho at the full rate, so for food purchases the unfiltered treatment is actually correct; prescription drug exemptions are not applied.
3. Apply the state rate to the base. That gives the state share of the tax.
4. Apply the local surcharge. The 0.03% average is the statewide effect of resort city and auditorium district taxes. Inside one of those resort cities the actual local rate is several percentage points, not a rounding error.
5. Combine into a total. State and local tax are added, then the combined tax is added to the purchase price for the final transaction amount.

For a $1,000 taxable purchase in Idaho:

1. Starting purchase price. The buyer rings up a $1,000.00 taxable retail purchase in Idaho, the baseline amount before any tax is applied.
2. State portion. Idaho's statutory state sales tax rate of 6.00% applies to the full purchase amount: $1,000.00 × 6.00% = $60.00 owed to the state.
3. Local portion. Local municipal, county, and special-district surcharges add an average of 0.03% on top of that: $1,000.00 × 0.03% = $0.30 more.
4. Combined tax due. Summing the two pieces, $60.00 in state tax plus $0.30 in local surcharge comes to $60.30 in total sales tax owed on the transaction.
5. Total out-of-pocket cost. Adding that $60.30 in tax to the $1,000.00 purchase price brings the buyer's total out-of-pocket cost to $1,060.30.

This example uses Idaho's statewide average local rate of 0.03%; actual combined rates vary by city and county, so a real receipt could show a combined rate above or below the 6.03% average used here.

Idaho's stored average local rate is 0.03%, the smallest local layer of any state on this site that has one at all. The combined rate is 6.03%, so on the $1,000 baseline the engine returns $60.00 of state tax and $0.30 of local, $60.30 in total.

The toggle barely moves. Switching the average local surcharge off takes the answer from $60.30 to $60.00. Thirty cents on a thousand dollars is the entire difference, and even on $25,000 the local component is only the gap between the $1,507.50 combined figure and $1,500.00 of state tax. That average is doing something misleading, though, and it is worth naming: Idaho's resort city local option taxes run as high as 3% in places like Sun Valley and McCall, and averaging them across a mostly untaxed state flattens them to almost nothing. This engine has no address-level lookup, so a purchase in a resort city is understated here by roughly the whole of that local option rate.

Two rungs. Row 3 rings up $500.00 and returns $30.00 state plus $0.15 local. Row 6, the $1,000 baseline, returns $60.00 and $0.30. Row 12 doubles to $2,000.00 and returns $120.00 and $0.60. Each $100 of Idaho spend carries $6.03 of tax at every rung.

The reverse calculation. With $1,000 to spend all in, the sticker price Idaho allows is $943.13: the engine returns $56.87 of tax and exactly $1,000.00 out the door.

The subtraction error, priced. Taking 6.03% off $1,000.00 gives $939.70. Run through the engine that returns $56.66 of tax and a $996.36 total, $3.64 of budget left on the table and a price quoted $3.43 below what the budget carries.

What the 6.03% is applied to, and what it should not be. The engine multiplies whatever you enter by the combined rate with no item-level filtering. Idaho taxes groceries at the full 6% rate and then refunds part of it through a per-person grocery credit on the income tax return, a mechanism that lives entirely outside this calculator: the tax shown here on a grocery total is correct, and the offsetting credit is invisible. Prescription drugs, most services, and production exemptions for agriculture and manufacturing are likewise not modelled, so entering an exempt purchase will produce a tax figure Idaho would not actually charge.

• Statutory exemptions on unprepared groceries, prescription medications, or manufacturing equipment.
• Special industry excise taxes (lodging hotel taxes, vehicle rental fees, alcohol/tobacco excise).
• Use tax compliance on out-of-state untaxed online purchases.
• B2B resale certificate exemptions or direct pay permit programs.

• Confusing State and Combined Rates: Quoting the state base rate without factoring in local city and county add-on taxes.
• Overlooking Consumer Use Tax: Failing to self-report and remit use tax on untaxed out-of-state purchases on your state income tax return.
• Missing Annual Sales Tax Holidays: Many states offer annual tax-free weekends for back-to-school items, severe weather supplies, or energy-efficient appliances.
• Failing to Collect Resale Certificates: Selling wholesale without collecting valid exemption certificates exposes sellers to full sales tax liability upon audit.

• Idaho State Tax Commission: 2026 Sales and Use Tax Rate Schedules. tax.idaho.gov
• Streamlined Sales Tax Governing Board (SSTGB): State Taxability Matrix. streamlinedsalestax.org/for-businesses/taxability-matrix