Oklahoma Estimated Tax Payments
Quarterly estimated payment schedule for Oklahoma in 2026, with federal comparison.
Oklahoma Tax Commission
https://oklahoma.gov/tax.html
Federal Schedule (Reference)
Federal Individual Estimated Payments (Form 1040-ES)
Apr 15, 2026
40 days awayJun 15, 2026
101 days awaySep 15, 2026
193 days awayJan 15, 2027
315 days awayOklahoma Estimated Payment Schedule
Quarterly dates by entity type. Dates matching the federal schedule are noted.
individual
Apr 15, 2026
40 days awayJun 15, 2026
101 days awaySep 15, 2026
193 days awayJan 15, 2027
315 days awayMatches federal schedule
Sole Proprietorship
Apr 15, 2026
40 days awayJun 15, 2026
101 days awaySep 15, 2026
193 days awayJan 15, 2027
315 days awayMatches federal schedule
C Corporation
Apr 15, 2026
40 days awayJun 15, 2026
101 days awaySep 15, 2026
193 days awayDec 15, 2026
284 days awayFederal vs. Oklahoma Comparison
| Quarter | Federal | Oklahoma | Match? |
|---|---|---|---|
| Q1 | Apr 15, 2026 | Apr 15, 2026 | Same |
| Q2 | Jun 15, 2026 | Jun 15, 2026 | Same |
| Q3 | Sep 15, 2026 | Sep 15, 2026 | Same |
| Q4 | Jan 15, 2027 | Jan 15, 2027 | Same |
Entity Types Without State Estimated Payments
The following entity types do not have state-level estimated payment requirements listed for Oklahoma:
- Partnership — Calendar-year due date follows federal timing for pass-through entities.
- S Corporation — Calendar-year due date follows federal timing for pass-through entities.
- LLC — Calendar-year due date follows federal timing for pass-through entities.
- Nonprofit — Nonprofit annual return generally due the 15th day of the 5th month.
FAQ
Does Oklahoma require estimated tax payments?
Yes. Oklahoma requires estimated payments for individual, Sole Proprietorship, C Corporation.
Are Oklahoma estimated payment dates the same as federal?
Yes, Oklahoma follows the same quarterly schedule as the federal government for most entity types.
What form do I use for Oklahoma estimated payments?
Contact Oklahoma Tax Commission at https://oklahoma.gov/tax.html for the correct estimated payment voucher and instructions.