Rhode Island tax deadlines in 2026: filing dates and estimated payments
Deadlines that fall in calendar 2026: the 2025 return and the 2026 estimated payments. Different year? See Rhode Island 2025 →
Rhode Island deadlines in 2026
| 2025 individual return due | April 15, 2026 |
|---|---|
| Extended filing deadline | October 15, 2026 |
| Payment due | April 15, 2026, extension or not |
| Final 2025 estimated payment | January 15, 2026 |
| 2026 estimated payments | April 15, 2026 · June 15, 2026 · September 15, 2026 · January 15, 2027 |
Conforms to the federal deadline.
Rhode Island estimated tax payments in 2026
Resident and nonresident individuals must make declarations of estimated tax and pay the amounts due if the tax can reasonably be expected to be $250 or more in excess of any credits allowable against the tax.
| Q1 (2026 tax year) | April 15, 2026 |
|---|---|
| Q2 (2026 tax year) | June 15, 2026 |
| Q3 (2026 tax year) | September 15, 2026 |
| Q4 (2026 tax year) | January 15, 2027 |
| Voucher | RI-1040ES, Rhode Island Resident and Nonresident Estimated Payment Coupons |
| Underpayment safe harbor | Underpayment interest is computed on the amount by which payments and credits are less than 80% of each installment when due; no interest is due if an exception under IRC 6654(e)(1) or (2) would apply to the corresponding Rhode Island amounts. |
| Pay online | taxportal.ri.gov |
Dates and the $250 threshold come from R.I. Gen. Laws 44-30-56 and 44-30-55 and the 80% rule from 44-30-84; confirm the safe-harbor wording on the RI-1040ES instructions before relying on it.
Source: webserver.rilegislature.gov, read September 3, 2026. “April 15; June 15; September 15; January 15 of following year.”
All 51 jurisdictions in one table: state estimated tax payment dates for 2026.
Rhode Island extensions
Every state's rule in one table: which states accept the federal extension in 2026.
| Does Rhode Island accept the federal extension? | Yes. A federal extension is honored; no state form. |
|---|---|
| State extension form | Form RI-4868 |
| Original due date | April 15, 2026 |
| Extended due date | October 15, 2026 |
| Payment | Still due April 15, 2026. The extension is to file, not to pay. Tax due must be paid by April 15, 2026; the extension is to file, not to pay, and interest and penalty apply to late payment. |
| How to get it | If no payment is required and you filed a proper federal extension covering the same period, skip RI-4868 and attach a copy of federal Form 4868 to the front of the Rhode Island return; otherwise file RI-4868 with payment (online portal or mail) by April 15. |
Source: tax.ri.gov, read September 3, 2026.
Federal deadlines in 2026
| 2025 Form 1040 | April 15, 2026 · extension October 15, 2026 |
|---|---|
| 2025 S-corp (1120-S) & partnership (1065) | March 16, 2026 |
| 2025 C-corp (Form 1120) | April 15, 2026 |
| 2026 federal estimated payments (1040-ES) | April 15, 2026 · June 15, 2026 · September 15, 2026 · January 15, 2027 |
Source: IRS Publication 509 and Form 1040-ES instructions, irs.gov.
Frequently asked questions
When are Rhode Island state taxes due in 2026?
Your 2025 Rhode Island individual income tax return is due April 15, 2026. If that date falls on a weekend or legal holiday, the deadline moves to the next business day. An extension moves the filing deadline to October 15, 2026, but any tax owed is still due on the original date.
When are Rhode Island estimated tax payments due in 2026?
Rhode Island estimated payments for the 2026 tax year are due April 15, 2026, June 15, 2026, September 15, 2026, January 15, 2027. Use RI-1040ES, Rhode Island Resident and Nonresident Estimated Payment Coupons or pay online. The final installment for 2025 was due January 15, 2026.
Does Rhode Island accept the federal extension?
Yes. A federal extension is honored; no state form. The state form is Form RI-4868. The extended filing deadline is October 15, 2026, and tax is still due by April 15, 2026.
Does a Rhode Island extension give me more time to pay?
No. An extension extends the time to file, not to pay. To avoid penalties and interest, pay what you expect to owe by April 15, 2026.
Dates are the statutory deadlines that fall in 2026 and move to the next business day when they land on a weekend or holiday. Each section links to the source it was checked against. Always confirm with the Rhode Island tax agency or the IRS before relying on a date. This is general information, not tax advice.