Washington vs Idaho: Take-Home Pay Compared (2026)
The same salary does not buy the same paycheck in two states. Here is what $100,000 leaves after federal tax, state tax, Social Security and Medicare in Washington and Idaho — and what salary closes the gap.
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At a glance
Tax year 2026, single filer, $100,000 gross, biweekly pay, no retirement contribution, health premium or local tax. Both columns come from the same engine as the main calculator, so only the state layer differs between them.
| Item | Washington vs Idaho |
|---|---|
| Washington | No wage income tax |
| Idaho | Flat 5.3% on taxable income |
| Take-home on $100,000 | $79,180 · $74,733 |
| Difference | −$4,447 a year (−$171 per paycheck), in favor of Washington |
| Salary needed in Washington to match | $93,700 |
Four salaries
The gap is not a fixed number of dollars — it moves with income as brackets and deductions do. This table runs the same comparison at four salaries, all for a single filer paid biweekly.
| Gross | Washington | Idaho | Difference |
|---|---|---|---|
| $50,000 | $42,355 | $40,558 | −$1,797 |
| $75,000 | $61,593 | $58,471 | −$3,122 |
| $100,000 | $79,180 | $74,733 | −$4,447 |
| $150,000 | $113,791 | $106,694 | −$7,097 |
Where the gap comes from
Nothing about federal tax changes when you cross a state line: the same brackets, the same standard deduction, the same Social Security and Medicare rates apply in both columns above. Every dollar of difference is the state schedule.
| State layer at $100,000 | Washington | Idaho |
|---|---|---|
| Structure | No wage income tax | Flat 5.3% on taxable income |
| Top rate | — | 5.3% |
| Standard deduction, single | — | $16,100 |
| State tax on $100,000 | $0 | $4,447 |
| Effective state rate | 0.00% | 4.45% |
Read the full schedules on their own pages: Washington income tax and Idaho income tax.
What salary matches
A comparison is only actionable as an offer. If a job in Washington pays what you earn today in Idaho, the offer is not neutral — the table below shows the gross salary each state needs to reproduce the other side’s $100,000 take-home.
| To take home | You need |
|---|---|
| $74,733 in Idaho | $93,700 in Washington |
| $79,180 in Washington | $106,800 in Idaho |
These are round trips, not a single ratio: the two figures do not telescope back to $100,000 exactly, because the salary that recreates a given net is not the salary that produced it once brackets are progressive. Use the equivalent salary calculator for your own numbers.
Common questions
Which state leaves more take-home pay on $100,000, Washington or Idaho?
Washington: $79,180 a year against $74,733 in Idaho, a difference of $4,447. That is about $171 per biweekly paycheck. The figures assume a single filer with the standard deduction, no 401(k), no health premium and no local tax.
How much would I need to earn in Washington to match $100,000 in Idaho?
$93,700. Above or below $100,000 the gap shifts with the brackets, so the equivalent salary is only exact for this target: it reproduces the $74,733 that $100,000 leaves in Idaho.
Why is there a gap if federal tax is the same in both states?
Federal income tax, Social Security and Medicare are identical no matter where you live, so the entire difference is the state layer. Washington has no wage income tax, while Idaho collects $4,447 (4.45% of gross, flat 5.3% on taxable income).
Does the gap get bigger at higher salaries?
Yes, it widens with income: $1,797 at $50,000 and $7,097 at $150,000. The reason is the shape of the schedules — a state with no wage tax never adds to the bill while the other state climbs its brackets.
Where to look next
This page is arithmetic, not relocation advice. It assumes you are a resident of the state you earn in and says nothing about which state may tax your wages while you live or work elsewhere — that question is answered once, for the whole country, in which state taxes a remote worker.
Estimates for a modelled filer, not tax advice. Filing status, local taxes, bonuses and part-year residency all move the number. See the Disclaimer.