Enter your pay and filing status. This Idaho calculator estimates federal tax, Social Security, Medicare, and Idaho tax for 2026, and shows gross pay, each deduction, and net pay per period and per year. It is an estimate only, not tax advice.
About this Idaho paycheck estimate
A flat rate is easy to quote and easy to misunderstand. The rate applies to taxable income after the standard deduction, not to your whole salary, so the effective state rate on gross pay is always lower than the headline rate. Flat 5.30%% on taxable income. Source for the state figures: Tax Foundation 2026 State Income Tax Rates and Brackets, with zero-rate threshold labelled as latest published 2025 threshold. Federal figures: IRS Revenue Procedure 2025-32 and Social Security Administration 2026 wage base. This page is a dated 2026 snapshot. Figures for 2027 will need a dated update, and withholding on a single pay stub may differ from this annual estimate.
At a glance for Idaho: a single state rate of 5.30%% on taxable income, with 2 rate steps in the schedule, and a standard deduction of $16,100 single where shown.
The one rate, and the deduction before it
A threshold labelled honestly
Idaho is a flat 5.3 percent for 2026. The zero-rate slice up to $4,811 single and $9,622 joint in the calculator is the latest published threshold available at research time, published for 2025, because the Tax Commission had not published a final 2026 inflation-adjusted threshold in the sources checked. If the final 2026 threshold differs, the tax on low pay moves slightly and the flat rate does not.
Idaho is flat at 5.30%% above its zero-rate slice. Taxable income up to $4,811 is taxed at 0 percent, then 5.30%% applies above that. The standard deduction is $16,100 single and $32,200 joint where shown, and it is subtracted before the rate applies.
Standard deduction in this estimate: $16,100 single and $32,200 joint, where shown. The federal standard deduction is separate and is applied to federal tax, not to state tax.
From gross pay to net pay, step by step
First, annual gross pay is found from salary, or from hourly rate times hours per week times 52 weeks. Pre-tax deductions are subtracted. Federal tax uses the 2026 federal brackets and standard deduction, $16,100 single, $32,200 joint, $24,150 head of household, $16,100 separate, from IRS Revenue Procedure 2025-32. Social Security is 6.2 percent up to the 2026 wage base of $184,500. Medicare is 1.45 percent on all wages, plus 0.9 percent additional Medicare over $200,000 single, $250,000 joint and $125,000 separate. State tax is then calculated on state taxable income as described above, and the result is split by pay frequency.
Local tax: This calculator models state income tax only. If your city or county levies its own income or earnings tax, that amount is not in this result and must be added separately.
A worked example at ordinary pay
A single filer earning $75,000 a year, paid biweekly, with no pre-tax deductions, has about $2,884.62 gross per paycheck. Federal tax is about $295.00 per paycheck, Social Security about $178.85, Medicare about $41.83, and state tax about $110.26 per paycheck, giving about $2,258.68 net per paycheck and about $58,725.78 net per year in this estimate. Federal taxable income in that example is about $58,900, and state taxable income about $58,900 where a state deduction applies. Change the filing status or the pay frequency and the per-paycheck figures move even though the annual figures do not.
Flat-rate paycheck questions, answered
Why is my net pay lower than salary divided by pay periods?
Because federal tax, Social Security, Medicare and state tax are taken out before you are paid. Gross divided by pay periods is before tax, net is after tax.
Is the top rate the rate on my whole salary?
No. In a graduated system each slice is taxed at its own rate, and in a flat system the rate applies only after the deduction. The effective rate, total state tax divided by gross pay, is the comparable figure.
Why might my real paycheck differ from this estimate?
Your W-4, your employer's withholding table, credits, itemized deductions, and any local tax or employer-specific deductions can all move the real figure. This page is an annual estimate, not a replica of one pay stub.