ID
Idaho Small Business Tax Guide
What Idaho's State Tax Commission says about sales tax, seller's permits, filing dates and income tax, quoted with the date retrieved. Educational only, not tax advice.
Disclaimer: This page is educational content only. Tax laws change, and your situation may differ. It is not legal, tax, or financial advice. Consult a qualified professional licensed in Idaho before making filing or planning decisions.
Tax landscape for small businesses
Idaho charges sales tax and a matching use tax. The Idaho State Tax Commission (Idaho, as retrieved on October 31, 2026) puts the rate in two sentences: "Idaho’s sales tax rate is 6%. Idaho’s use tax rate is also 6%." It also says: "Sales and use taxes apply to the sale of goods and services, unless an exemption applies." Its examples of retail sales include "Production, fabrication, printing, or imprinting labor".
On income tax, the Commission's individual income tax guide (Idaho, as retrieved on October 31, 2026) says: "The income tax rate for 2025 is 5.3% on Idaho taxable income." That figure is for 2025; this page doesn't give a later rate, so confirm the year you're filing for with the Commission. For business entities, its business income tax guide (Idaho, as retrieved on October 31, 2026) says: "The Idaho business tax rate is on taxable income." Its rate history lists "5.3%" for "2025", and it adds: "Most businesses must pay the $10 PBF tax."
Worked example (sample figures, not tax advice): the Commission (Idaho, as retrieved on October 31, 2026) says "Parts used to make repairs are taxable." It lists repair labor among charges with no sales or use tax "if they’re separately stated on the invoice". Say a repair shop's invoice shows $120.00 in parts on one line and $200.00 in repair labor on another. Tax is due on the parts only: $120.00 × 6% = $7.20. The customer's total comes to $120.00 + $200.00 + $7.20 = $327.20. This uses the state rate alone; ask the Tax Commission whether anything else applies where you make the sale.
Tax overview
Each row lists a tax area and its notes. Confirm current figures with your state's tax agency or the IRS.
| Tax type | Rate or basis | Notes |
|---|---|---|
| Sales and use tax | "6%" (Idaho State Tax Commission sales and use tax guide, Idaho, as retrieved on October 31, 2026) | Covers "the sale of goods and services, unless an exemption applies". The use tax rate is "also 6%". The Commission's guide (Idaho, as retrieved on October 31, 2026) adds: "Idaho offers some exemptions from sales and use taxes when buying goods." |
| Individual income tax | "5.3%" for 2025 (Commission individual income tax guide, Idaho, as retrieved on October 31, 2026) | Charged "on Idaho taxable income". The figure is labeled 2025; ask the Commission or a tax professional which rate applies to your return. |
| Business income tax | "5.3%" for "2025" (Commission rate history, Idaho, as retrieved on October 31, 2026) | Most businesses also owe the "$10 PBF tax" (Permanent Building Fund). |
Filing requirements
This list isn't a complete checklist for your business.
Hold a seller's permit
The Idaho State Tax Commission (Idaho, as retrieved on October 31, 2026) says: "Almost everyone selling goods or offering taxable services in Idaho must:" have a seller's permit, collect sales tax, file a sales and use tax return and send the tax collected to the Commission. It also says: "You might not need a seller’s permit if you only make a few sales per year." That small-seller exemption has a limit. The Commission's filing page (Idaho, as retrieved on October 31, 2026) says: "If you’re an Idaho resident claiming the small seller exemption, and your cumulative sales in a calendar year exceed $5,000, you no longer qualify."
File on the schedule the Commission sets
The Commission's filing page (Idaho, as retrieved on October 31, 2026) says: "Most retailers file returns every month. They forward the tax due for each month by the 20th day of the following month." For smaller sellers: "Retailers who owe less than $750 tax per quarter pay their taxes quarterly. These taxes are due within 20 days after the end of the quarter." And with no sales: "You must file a return even if you don’t make any sales." It also says: "Don’t report any sales you make through registered marketplace facilitators or short-term rental marketplaces that already report those sales to us."
Know the late-filing penalty
The same filing page (Idaho, as retrieved on October 31, 2026) puts the penalty for a late return at "5% of the tax due for each month the return is late, to a maximum of 25%". It adds: "The minimum penalty is $10." Interest is owed as well: "You owe interest on the overdue tax from the original due date of the return until the tax is paid."
File a business income tax return
The Commission's business income tax guide (Idaho, as retrieved on October 31, 2026) says you must file for your business entity when, among other cases, "You’re transacting business in Idaho." or "You have income attributable to Idaho."
Deductions and write-offs
Confirm with your state how it treats each item.
- Deducting part of self-employment tax: in the US (federal), the IRS's self-employment tax page, last reviewed or updated October 30, 2026, says: "You can deduct the employer-equivalent portion of your self-employment tax in figuring your adjusted gross income."
- Health insurance when you work for yourself: that IRS page (federal, last reviewed or updated October 30, 2026) also says: "Under Section 2042 of the Small Business Jobs Act, a deduction, for income tax purposes, is allowed to self-employed individuals for the cost of health insurance."
- Whether Idaho follows these federal deductions isn't covered here. Ask the Tax Commission or a tax professional before you count on one.
Practical tips
- Plan for invoices that are still unpaid when the return is due. The Commission's filing page (Idaho, as retrieved on October 31, 2026) says: "Sales tax is due on the accrual method of accounting." It adds: "This applies even if your customer hasn’t paid you by the time your tax return is due."
- Give repair or installation labor its own invoice line. The Commission's sales and use tax guide (Idaho, as retrieved on October 31, 2026) doesn't tax that labor "if they’re separately stated on the invoice".
- A card-payment fee is part of the taxable price. Among charges taxed "even if they’re separately stated on the invoice", the Commission's sales and use tax guide (Idaho, as retrieved on October 31, 2026) lists "Service fees for paying with a credit card, debit card, or gift card".
- Keep your records. The Commission's individual income tax guide (Idaho, as retrieved on October 31, 2026) says: "Keep copies of your tax returns and all supporting documentation for at least seven years." Billed's expense tracking page says: "Attach the receipt when you record the expense, and it stays with that entry in your Billed account instead of in a drawer or an inbox."
Frequently asked questions
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At a glance
| Tax | Quoted rate and source |
|---|---|
| Sales and use tax | "Idaho’s sales tax rate is 6%." (Idaho State Tax Commission sales and use tax guide, Idaho, as retrieved on October 31, 2026) |
| Individual income tax | "The income tax rate for 2025 is 5.3% on Idaho taxable income." (Idaho State Tax Commission individual income tax guide, Idaho, as retrieved on October 31, 2026) |
| Business income tax | "5.3%" for "2025" (Commission rate history, Idaho, as retrieved on October 31, 2026) |
| Federal self-employment tax | "The self-employment tax rate is 15.3%." (IRS, In the US (federal), last reviewed or updated October 30, 2026) |
When this isn't for you
This page leaves out payroll withholding, property tax, excise taxes and selling into other states. It also isn't tax advice; bring questions about your own filings to the Idaho State Tax Commission or a tax professional.