Wyoming (WY)
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None required
✓ No State Income Tax
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WY — WyomingWyoming Has No Personal Income Tax — Here’s What That Means
Wyoming levies no personal or corporate income tax of any kind. If you live in Wyoming, you have no state income tax return to file, no state extension to request, and no state payment to make. Your only filing obligation is federal — and if you need more time on your federal return, you can file IRS Form 4868.
Wyoming Extension Checklist — 2026
No state paperwork of any kind. Just handle your federal return.
No state return
No Wyoming Return Required
Wyoming imposes no personal income tax, so there is no state return to file, no state extension form, and no state agency to contact for that purpose. Your state-level obligation is satisfied simply by living in Wyoming.
April 15, 2026
Extend Your Federal Return (If Needed)
Need more time on your federal return? File IRS Form 4868 by April 15, 2026 for an automatic extension to October 15, 2026. Pay any federal balance due by April 15 to avoid IRS interest and penalties.
irs.gov/directpay
If you owe federal tax, pay by April 15, 2026 via IRS Direct Pay (free) or card.
October 15, 2026
File Your Federal Return
File your federal return with the IRS. There is no Wyoming return to add. Filing sooner means a faster refund — and if you extended, your federal deadline is October 15, 2026.
Secure eFile · Step-by-step guidance · 24/7 support
Wyoming State Penalties — None Apply
Because Wyoming has no personal income tax, there are no state failure-to-file or failure-to-pay penalties of any kind. All penalty risk sits at the federal level.
| Penalty Type | Rate | Cap | Trigger |
|---|---|---|---|
| Wyoming Failure to File | None — no personal income tax | ||
| Wyoming Failure to Pay | None — no personal income tax to pay | ||
Wyoming Personal Income Tax — Quick Facts
| Personal Income Tax | None — Wyoming has no personal income tax |
| Legal Basis | Wyoming Constitution Art. 15, §18 requires a full tax credit against sales/use/ad valorem taxes paid if an income tax were ever imposed — a near-insurmountable condition rather than an outright ban; Wyo. Stat. §39-12-101 separately bars any county, city, or town from imposing its own income tax |
| State Return Required | No |
| State Extension Required | No |
| Federal Return | Still required — file with the IRS |
| Federal Extension | File IRS Form 4868 by April 15, 2026 (extends to October 15, 2026) |
| State Agency | Wyoming Department of Revenue (handles sales/use, mineral/severance, and property tax — not personal income tax, which doesn’t exist) |
| State Failure-to-File / Failure-to-Pay Penalty | None — no personal income tax |
Wyoming Tax — Frequently Asked Questions
Do I need to file a Wyoming state tax return?
No. Wyoming has no personal income tax, so there is no state return, extension, or payment. Your only filing obligation is federal.
Does Wyoming’s constitution ban an income tax the way Texas’s does?
Not exactly. Wyoming’s constitution (Art. 15, §18) doesn’t outright prohibit an income tax — instead, it requires that any income tax ever imposed give taxpayers a full, dollar-for-dollar credit for sales, use, and property taxes they already paid that year. That makes an income tax practically self-defeating rather than categorically banned.
Is there any tax on capital gains or investment income in Wyoming?
No. Unlike Washington’s capital gains excise tax, Wyoming has no tax of any kind on individual investment income, wages, or salary.
What about my federal return?
Federal income tax still applies to Wyoming residents. If you need more time to file, file IRS Form 4868 by April 15, 2026 for an automatic extension to October 15, 2026. Pay any federal balance due by April 15 to avoid IRS interest and penalties.
Is a Wyoming personal income tax likely to happen soon?
There’s no current legislative activity toward one. Recent Wyoming Legislature sessions have focused instead on property tax relief, with no personal income tax bills introduced.
Which Wyoming return form do I need?
None — there is no state personal income tax return of any kind.
Ready to File Your Federal Return?
File your federal return online — no Wyoming state return required. October 15 federal extension deadline — secure, fast, with live support.