💼 Idaho Self-Employment Tax Calculator
Enter your income to see your Idaho tax breakdown.
Three Idaho Rules That Change How You Plan
Idaho does not require quarterly estimates from individuals
Most states copy the IRS and charge a penalty if you do not pay through the year. Idaho does not. The State Tax Commission says individuals are not required to make estimated income tax payments. You can send voluntary payments if you would rather not face one large bill in April. Federal quarterly payments are still mandatory.
In practice the Idaho quarterly figure in the calculator is a savings target and not a deadline. Set it aside anyway. An Idaho bill of $2,586 on $75,000 of profit is easier to pay from a separate account than from April's cash flow.
The federal QBI deduction carries over
Idaho is one of a small number of states that also allows the federal qualified business income deduction on the state return. If you qualify for the 20% deduction federally, it lowers your Idaho taxable income too. Most states start from adjusted gross income and never see it.
The calculator does not apply QBI, at the federal level or in Idaho, so its Idaho figure is on the high side for most sole proprietors. At 5.3%, a $12,000 QBI deduction is worth about $636 of Idaho tax.
The first $4,811 is untaxed, and every return pays $10
For 2026 the 5.3% rate applies only above $4,811 of Idaho taxable income for a single filer, or $9,622 on a joint return. That comes after the standard deduction of $16,100 or $32,200, the same amounts as the federal return. The rate was 5.695% until House Bill 40 lowered it in 2025.
On top of the income tax, every return that has to be filed pays a flat $10 permanent building fund tax. It is small, but it explains why your return shows $10 more than a calculator does.
No local income tax
No Idaho city or county taxes income. Boise, Meridian and Coeur d'Alene freelancers pay the state rate and nothing more on their earnings.
Idaho Income Tax Brackets and Deductions for 2026
| Rate | Taxable income, single | Taxable income, married filing jointly |
|---|---|---|
| 0% | $0 – $4,811 | $0 – $9,622 |
| 5.3% | Over $4,811 | Over $9,622 |
| Before and after the brackets | Single | Married filing jointly |
|---|---|---|
| Standard deduction | $16,100 | $32,200 |
Idaho by the Numbers
At $75,000 net profit, Idaho ranks #31 of 51 jurisdictions for total 1099 tax burden (rank 1 = lowest). A single freelancer pays $2,586 in state tax on top of $17,101 federal, $19,687 in total, a 26.2% effective rate.
What a single freelancer pays in Idaho (2026)
| Net profit | Idaho state tax | Total tax (SE + federal + state) | Take-home | Effective rate |
|---|---|---|---|---|
| $50,000 | $1,355 | $11,815 | $38,185 | 23.6% |
| $75,000 | $2,586 | $19,687 | $55,313 | 26.2% |
| $100,000 | $3,817 | $29,563 | $70,437 | 29.6% |
| $150,000 | $6,280 | $49,665 | $100,335 | 33.1% |
Single filer, standard deduction, no QBI or other deductions. Computed with the same 2026 engine as the calculator.
How Idaho compares to its neighbors at $75,000
| State | State tax | Total tax | vs Idaho |
|---|---|---|---|
| Washington | $0 | $17,101 | $2,586 less |
| Montana | $2,577 | $19,679 | $9 less |
| Utah | $2,805 | $19,907 | $219 more |
| Nevada | $0 | $17,101 | $2,586 less |
Sources: IRS Rev. Proc. 2025-32 (federal brackets and standard deduction), SSA 2026 wage base ($184,500), Idaho State Tax Commission, and the Tax Foundation's 2026 state income tax table. Last updated October 7, 2026.
Idaho Freelancer FAQ
What is Idaho's income tax rate for 2026?
A flat 5.3% on taxable income above $4,811 for single filers and $9,622 for joint filers, after a standard deduction of $16,100 or $32,200. House Bill 40 cut the rate from 5.695% in 2025.
Do I have to make quarterly estimated payments to Idaho?
No. Idaho does not require individuals to make estimated income tax payments, although you can make voluntary ones. Federal quarterly payments are still required.
Does Idaho allow the QBI deduction?
Yes. Idaho is one of the few states where the federal qualified business income deduction also reduces state taxable income.
What is the $10 charge on an Idaho tax return?
It is the permanent building fund tax, a flat $10 on every Idaho income tax return that is required to be filed.
📐 How these Idaho numbers are produced
The calculator and every table on this page run the same engine: 2026 federal brackets and standard deduction, and self-employment tax at 15.3% on 92.35% of net profit. Idaho's own 2026 brackets, deductions, exemptions and credits are applied on top, as shown step by step in the calculator. When a legislature changes a rate during the year, the engine is updated and the change is recorded on the methodology and changelog page.
- Federal brackets & standard deduction: IRS Rev. Proc. 2025-32 (2026)
- Self-employment tax: 15.3% with the 92.35% net-earnings adjustment, the 50% SE-tax deduction, and the 0.9% Additional Medicare Tax, per IRS rules
- Social Security wage base: $184,500 for 2026 (SSA)
- Idaho figures: Idaho State Tax Commission, cross-checked against the Tax Foundation's 2026 table
Built & maintained by Rahul B.
A software developer who got tired of “free” 1099 calculators that use lazy flat rates and give wrong numbers — so I built one on the actual 2026 IRS brackets and real state-by-state rates, updated every tax year. More about this tool →
Last reviewed for tax year 2026 · Independent tool — not affiliated with the IRS. Estimates for planning only; verify with a tax professional before filing.