Self-Employed Tax Calculator — Idaho (2026)
Self-employed in Idaho? Your tax bill has three layers that a W-2 employee never sees in full: 15.3% self-employment tax on 92.35% of net profit, federal income tax, and Idaho state income tax. This calculator applies all three to your 2026 net profit and shows the quarterly amount you should be setting aside. Idaho uses a flat personal income tax of 5.30% applied to taxable income after a state standard deduction of $16,100.
Idaho Self-Employed Tax Calculator
Gross 1099 income minus business expenses.
Self-employment tax vs Idaho income tax
Self-employment tax is federal and identical in all 50 states: 12.4% Social Security up to $184,500 of net earnings plus 2.9% Medicare with no cap. Half of it is deductible against income tax, which is why the calculator subtracts it before applying brackets.
Idaho then taxes essentially the same profit figure at 5.30%. On $80,000 of net profit that adds roughly $3,087 to the bill.
Idaho has no separate city or county income tax, so the state figure above is the full sub-federal income tax you pay.
Deductions that matter for Idaho freelancers
Net profit — not gross revenue — drives every number here. Ordinary and necessary business expenses reduce SE tax, federal tax, and Idaho tax simultaneously: the 2026 standard mileage rate of $0.67/mile, home-office square footage, software, equipment, professional insurance, and the self-employed health insurance deduction.
Retirement plans go further. A SEP-IRA or solo 401(k) reduces income tax (though not SE tax) and is often the largest single deduction available to a profitable tech contractor in Boise.
Working for yourself in Idaho
Idaho's economy leans on tech, agriculture, and manufacturing, which shapes the contractor market around Boise — and your fixed costs. With one-bedroom rent near $1,350, a freelancer needs meaningfully more gross revenue than an employee to reach the same lifestyle, because there is no employer paying half of FICA.
Idaho transitioned from progressive brackets to a single flat 5.8% rate in 2023, and has already cut it twice to 5.3% in 2025.
Local and payroll taxes Idaho adds on top
Idaho adds no state-mandated employee payroll deduction beyond FICA, so nothing extra is taken from your gross pay at the state level.
Idaho has no separate city or county income tax, so the state figure above is the full sub-federal income tax you pay.
Nobody withholds these for you when you are self-employed in Idaho. Local wage taxes, city business licences and gross-receipts style levies are yours to register for and remit alongside your quarterly federal and state estimates.
Working across a state line from Idaho
Idaho has no income-tax reciprocity agreements, so if you live here and work across a state line you generally file a nonresident return in the work state and claim a credit at home to avoid double taxation.
Remote and hybrid work complicates this further: most states tax income where the work is physically performed, so a Boise resident spending part of the year at a client site in Washington may owe a nonresident return there. Keep a day-count log if you split time between states.
The rest of your Idaho tax bill
Idaho charges a 6% state sales tax, homeowners pay an average effective property tax of 0.63% of market value, and the minimum wage in force during 2026 is $7.25 an hour.
Few local add-ons, so 6% is close to the effective statewide rate.
Income tax is only one part of a state's take. Idaho recovers revenue through sales and property tax as well, which is why headline income tax rates alone are a poor guide to how far a salary really goes. Idaho exempts Social Security and offers a limited deduction for certain public pensions at 65+.
Idaho vs Washington on the same salary
On a $90,000 salary, a single filer keeps about $68,228 a year in Idaho against roughly $72,145 in Washington — a difference of $3,917, or $326 a month.
Effective combined rates are 24.2% in Idaho and 19.8% in Washington. Set that gap against living costs: index 99 here versus 116 there, with property tax at 0.63% and 0.94% respectively.
Idaho income tax brackets 2026 (single filer)
| Taxable income | Rate |
|---|---|
| $0 and up | 5.30% |