Verified April 2026
How to Calculate Sales Tax in Idaho, Idaho
2026 Step-by-Step Guide for Businesses & Consumers
Current Idaho Sales Tax Rate
| Jurisdiction | Rate |
|---|---|
| Idaho State Sales Tax | 6.000% |
| City / Municipal Tax | 0.100% |
| Total Combined Rate | 6.100% |
How to Calculate Sales Tax in Idaho
-
1
Find the combined rate
The combined sales tax rate in Idaho is 6.100%. This equals: Idaho state rate of 6.000% + County 0.000% + City 0.100%.
-
2
Convert the percentage to a decimal
6.100 ÷ 100 = 0.0610
-
3
Multiply by your purchase amount
Example: $100.00 × 0.0610 = $6.10 in sales tax
-
4
Add tax to the original price
$100.00 + $6.10 = $106.10 total cost
What's Taxable in Idaho?
Most tangible personal property is taxable in Idaho. Check with the
Idaho Department of Revenue for specific exemption categories.
Do You Have Nexus in Idaho?
Economic Nexus Threshold
If your business has over $100,000 in annual
Idaho sales or 200 transactions,
you are required to collect and remit Idaho sales tax. This applies to out-of-state remote sellers too.
Expert Sales Tax Tips for Idaho
Out-of-State Sellers
Selling into Idaho from out of state? Register before you cross the $100,000 threshold to avoid back taxes and penalties.
Frequently Asked Questions
Sales Tax Calculator
Using 6.100% rate for Idaho
$
Tax Amount
$0.00
Total with Tax
$100.00
Rate applied: 6.100% combined