Idaho
6.03%
Combined average · rank #37
- State
- 6%
- Avg. local
- 0.03%
- Max local
- 3%
Compare different states
July 2026
July 2026Idaho vs Washington Sales Tax
Idaho has the lower combined average by 3.54%. Compare state, average local, maximum local, and combined rates—plus the dollar difference on common purchases.
By Sammy S. · Founder · AuthorUpdated for 2026
Lower combined rate
Idaho is lower
3.54% lower, saving about $35.40 per $1,000 of general taxable purchases.
Side-by-side rate scoreboard
Washington
9.57%
Combined average · rank #3
- State
- 6.5%
- Avg. local
- 3.07%
- Max local
- 4.2%
Tax on common purchase amounts
General taxable purchase estimates using each state's population-weighted combined average.
| Purchase | Idaho tax | Washington tax | Difference |
|---|---|---|---|
| $100.00 | $6.03 | $9.57 | $3.54 |
| $500.00 | $30.15 | $47.85 | $17.70 |
| $1,000.00 | $60.30 | $95.70 | $35.40 |
| $5,000.00 | $301.50 | $478.50 | $177.00 |
$100.00 purchase
Idaho$6.03
Washington$9.57
Difference: $3.54
$500.00 purchase
Idaho$30.15
Washington$47.85
Difference: $17.70
$1,000.00 purchase
Idaho$60.30
Washington$95.70
Difference: $35.40
$5,000.00 purchase
Idaho$301.50
Washington$478.50
Difference: $177.00
Annual taxable-spending comparison
Illustrative tax at different levels of pre-tax spending. Household exemptions and local rates can change actual totals.
$5,000 taxable spending
Idaho$301.50
Washington$478.50
Gap: $177.00
$10,000 taxable spending
Idaho$603.00
Washington$957.00
Gap: $354.00
$20,000 taxable spending
Idaho$1,206.00
Washington$1,914.00
Gap: $708.00
$40,000 taxable spending
Idaho$2,412.00
Washington$3,828.00
Gap: $1,416.00
What the rate difference means
At $20,000 of general taxable spending, the average-rate gap is about $708.00. That is an estimate—not a promise of household savings.
Why your checkout rate may differ
Local jurisdictions, delivery addresses, sourcing rules, tax holidays, and exemptions for groceries, medicine, clothing, vehicles, services, or digital products can change the final amount.
Idaho vs Washington sales tax FAQs
Idaho has the lower combined average by 3.54%. Idaho averages 6.03% and Washington averages 9.57%.
Idaho's statewide general rate is 6%. Washington's statewide general rate is 6.5%. Local taxes can change the combined checkout rate.
The estimated difference is $35.40, using Idaho's 6.03% and Washington's 9.57% combined averages.
No. These are population-weighted statewide combined averages. City, county, special-district, sourcing, and product-taxability rules can produce a different transaction rate.
Not necessarily. Grocery exemptions and reduced rates are separate from the general rate comparison. Prepared food and restaurant meals may also follow different rules.
Idaho has the lower headline combined average, but exemptions, local rates, and what a household buys determine the actual savings.
Compare another pair
Compare any two states
State, local, and combined rates with purchase and annual-spending differences.
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Estimates use population-weighted combined general rates as of July 1, 2026. Verify the exact address and product rate with the relevant revenue agency.