Idaho
Idaho paycheck calculator
Idaho taxes wages at 5.3% after House Bill 40, starting from a standard deduction that matches the 2026 federal amounts ($16,100 single / $32,200 joint). The published table also shows a zero-rate threshold near $4,811 single / $9,622 joint; this estimate applies that threshold. Inflation-adjusted widths for 2026 were not fully available in the source table, so confidence is estimated.
Boise does not add a city wage tax here. Because the rate is flat above the threshold, reasoning about a raise is simpler than in a twelve-bracket state — and still not “5.3% of gross,” because the federal-sized deduction and the zero slice come off first. Federal brackets and FICA remain the larger lines for most salaries.
A traditional 401(k) reduces the Idaho base; it does not reduce Social Security or Medicare. If the zero-rate threshold is already baked into how your payroll starts the 5.3% calculation, this line can run slightly low — the methodology calls that out rather than hiding it.
Example take-home
| Salary | Federal | FICA | State | Payroll | Local | Net / year | Net / check |
|---|---|---|---|---|---|---|---|
| $40,000.00 | $2,620.00 | $3,060.00 | $1,011.72 | $0.00 | $0.00 | $33,308.28 | $1,281.09 |
| $60,000.00 | $5,020.00 | $4,590.00 | $2,071.72 | $0.00 | $0.00 | $48,318.28 | $1,858.39 |
| $80,000.00 | $8,770.00 | $6,120.00 | $3,131.72 | $0.00 | $0.00 | $61,978.28 | $2,383.77 |
| $100,000.00 | $13,170.00 | $7,650.00 | $4,191.72 | $0.00 | $0.00 | $74,988.28 | $2,884.16 |
| $150,000.00 | $24,734.00 | $11,475.00 | $6,841.72 | $0.00 | $0.00 | $106,949.28 | $4,113.44 |
Loading the 2026 calculator…
What this page includes
- Federal income tax using the 2026 standard deduction and Rev. Proc. 2025-32 brackets
- Social Security (6.2% up to $184,500) and Medicare (1.45%, plus Additional Medicare when wages clear the filing-status threshold)
- Idaho: flat state income tax at 5.3%
- No employee state disability / paid-leave premium modeled for this state yet
- Local wage tax only if you select a city/county or enter a custom percent
Local tax
Idaho does not have a local wage tax in this file. City costs show up in rent and sales tax, not as a second income-tax line on the stub.
What is not included
Credits, itemized deductions, multi-state credits, property tax, sales tax, and unsourced local rates are not included. Employer payroll tables can differ from this annualized estimate. This Idaho page does not invent taxes that are missing from the 2026 data files.
Questions
What is Idaho’s 2026 rate in this model?
A flat 5.3% after the federal-sized standard deduction and the table’s small zero-rate threshold.
Why is Idaho marked estimated?
2026 inflation-adjusted bracket widths were not fully published in the source table used here.
Does Boise tax wages on this page?
Not as a city income tax. The state line is the only Idaho income tax applied.
Nearby
Compare · Bonus · Hourly · All states · Local taxes
Sources
- IRS newsroom, tax year 2026 inflation adjustments (Rev. Proc. 2025-32)
- Rev. Proc. 2025-32 (PDF)
- Tax Foundation, 2026 federal income tax brackets
- IRS Publication 15-T, Federal Income Tax Withholding Methods
- SSA, Contribution and benefit base
- IRS Publication 15 (Circular E), Employer's Tax Guide
- IRS, Questions and answers for the Additional Medicare Tax
- Tax Foundation, State Individual Income Tax Rates and Brackets, 2026
- IRS, state government websites index
See a rate that looks wrong? The sources and the gaps are public.