First 2027 COLA payment dates: Dec 31, 2026, then Jan 13, 20, 27
The 2027 Social Security COLA is effective for December 2026 and payable in January. Exact first-payment dates by birthday group, from 20 CFR 404.1807.
Every autumn, the Social Security Administration announces a percentage and the conversation stops there. But the percentage is not the payment, and the payment is not the announcement. For 2027, arithmetic and a federal holiday combine to produce a strange result: the first checks that carry the new cost-of-living adjustment go out before the year the adjustment is named for even ends. Some beneficiaries will see it on December 31, 2026.
The short answer: the 2027 COLA is effective for the December 2026 benefit, and Social Security pays that benefit in January 2027 on a schedule set by birth date. Two groups get there first, on Thursday, December 31, 2026, because January 1, 2027 is a federal holiday that pushes their normal payment date backward into the prior year. Everyone else sees the increase on one of three Wednesdays in January.
| Group | First payment with the 2027 COLA |
|---|---|
| SSI recipients | Thursday, December 31, 2026 |
| Social Security, entitled before May 1997 (day-3 payees) | Thursday, December 31, 2026 |
| Born on the 1st–10th | Wednesday, January 13, 2027 |
| Born on the 11th–20th | Wednesday, January 20, 2027 |
| Born on the 21st–31st | Wednesday, January 27, 2027 |
The rest of this page walks through why the table looks the way it does, because the reasoning is more useful than the dates alone — it is the same reasoning that determines every Social Security payment date, not just this one.
Why December, not January
The statute that creates the COLA is specific about when it takes effect, and the wording matters more than most coverage lets on. Under 42 U.S.C. 415(i)(2)(B), “the increase provided by subparagraph (A) with respect to a particular cost-of-living computation quarter shall apply in the case of monthly benefits under this subchapter for months after November of the calendar year in which occurred such cost-of-living computation quarter.” The computation quarter for the 2027 COLA is July through September of 2026, so the increase applies to benefit months after November 2026 — which means it starts with December 2026, not January 2027.
That single clause is the reason this page exists. Most people assume a “2027 COLA” must first appear in a 2027 payment. It does not. It first appears in the benefit calculated for December 2026, a month that is still, by the calendar, 2026.
Social Security pays a month behind
The second piece of the puzzle is that Social Security retirement, survivor, and disability benefits are paid in arrears. The check issued in a given month is payment for the previous month, not the current one. December 2026 benefits, the first to include the COLA, are therefore paid in January 2027 for most recipients. That is the mechanical reason the increase generally shows up as a January event, even though the statute effective date is December.
There is one narrow exception, and it is the reason the December 31 date exists at all.
The payment calendar, from the regulation
The rule that assigns each beneficiary a specific payment day is 20 CFR 404.1807. Its core text reads: “Insured individuals born on the 1st through the 10th of the month will be paid on the second Wednesday of each month. Insured individuals born on the 11th through the 20th of the month will be paid on the third Wednesday of each month. Insured individuals born after the 20th of the month will be paid on the fourth Wednesday of each month.” Applied to January 2027, where the Wednesdays fall on the 6th, 13th, 20th, and 27th, the second, third, and fourth Wednesdays are January 13, January 20, and January 27 — the three dates in the table above.
The same regulation preserves a legacy schedule for a shrinking group: “If you or any other person became entitled to benefits on the earnings record of the insured individual based on an application filed before May 1, 1997, you will continue to receive your benefits on the 3rd day of the month.” For most months, the 3rd is simply the 3rd. January 2027 is not most months, because January 3, 2027 falls on a Sunday.
That is where the regulation’s holiday rule takes over: “If the day regularly scheduled for the delivery of your benefit payment falls on a Saturday, Sunday, or Federal legal holiday, you will be paid on the first preceding day that is not a Saturday, Sunday, or Federal legal holiday.” Walking backward from Sunday, January 3, the preceding day is Saturday, January 2, also excluded. Before that is Friday, January 1 — New Year’s Day, a federal holiday, also excluded. The next day back is Thursday, December 31, 2026, which clears every condition. That is the payment date for anyone still on the pre-1997 day-3 schedule, and because it is payment for the December 2026 benefit, it is the first Social Security payment anywhere to carry the 2027 COLA.
The SSI case: a different rule, the same December 31
Supplemental Security Income runs on separate rules from Social Security retirement and disability benefits, and it happens to land on the identical date for a different reason. Under 20 CFR 416.502, “a payment will be made on the first day of each month and represents payment for that month. If the first day of the month falls on a Saturday, Sunday, or legal holiday, payments will be made on the first day preceding such day which is not a Saturday, Sunday, or legal holiday.”
Two things are different here, and both matter. First, SSI pays for the current month, not the prior one — the January payment represents January, not December. Second, the SSI increase takes effect with the payment for January 2027; the Social Security Administration words it the same way in its annual Federal Register determinations, where the new SSI rates are stated as effective for payments made for January. So the first SSI payment at the new rate is the January payment, wherever the calendar happens to deliver it. What the holiday rule changes is only the delivery date: January 1, 2027 is a Friday and a federal holiday, so the preceding non-weekend, non-holiday day is Thursday, December 31, 2026. SSI recipients therefore receive their COLA-inclusive January payment on the last day of December.
Finding your own group
Two questions settle which row of the table applies to you. Do you receive SSI, Social Security, or both? If SSI, your answer is December 31, 2026, regardless of birth date, because SSI eligibility does not use the birth-date calendar at all. If you receive Social Security and your benefit began before May 1997 on the record in question, check whether that day-3 schedule still applies to you; if so, your first COLA payment is also December 31, 2026.
Everyone else uses birth date alone. Born the 1st through the 10th, the payment lands on the second Wednesday of the month — January 13, 2027. Born the 11th through the 20th, the third Wednesday, January 20. Born after the 20th, the fourth Wednesday, January 27. The Social Security Administration publishes the full year in its Schedule of Social Security Benefit Payments 2027, which is the primary source behind every date on this page and the one worth bookmarking for months beyond January.
What the date does not tell you
None of this determines how much larger the payment will actually be. The percentage itself is not yet known; it depends on the July, August, and September 2026 readings of the Consumer Price Index for Urban Wage Earners and Clerical Workers, with the announcement expected in mid-October 2026. We track that calculation as each month’s data arrives in the 2027 Social Security COLA tracker, which is the better page to read if the question is “how much,” rather than “when.”
It is also worth separating the announced percentage from the number that actually lands in a bank account. The headline COLA is a raw increase to the gross benefit; what most recipients notice is the net change after the Medicare Part B premium is deducted, since that premium is set separately and can absorb a meaningful share of the raise. Our breakdown of the 2027 COLA net of Medicare Part B works through that arithmetic, and the Medicare hold-harmless provision explains the rule that caps how much a Part B increase can cut into the dollar amount of a COLA for existing beneficiaries. If you are still working while collecting, the Social Security earnings test is the other 2026-into-2027 mechanic worth knowing, since it interacts with the same January payment calendar.
For now, the dates are the settled part of this story. The 2027 Social Security COLA tracker is where the size of the increase gets settled next, month by month, through October.
Quick answers
When will I see the 2027 COLA in my Social Security payment?
The 2027 COLA is effective for the December 2026 benefit, which Social Security pays in January 2027 because benefits are paid a month behind. If your entitlement began before May 1997, your day-3 payment lands early, on December 31, 2026, since January 3, 2027 falls on a Sunday. Everyone else sees the increase in the January 2027 payment tied to their birth date.
Why does my neighbor get the COLA increase before me?
Social Security pays on a staggered calendar tied to birth date and, for a small group, to when benefits started. People born on the 1st through the 10th are paid the second Wednesday of the month; the 11th through the 20th, the third Wednesday; after the 20th, the fourth Wednesday. A small group who started benefits before May 1997 is still paid on the 3rd, which is why that payment can land earlier than the Wednesday schedule most people are on.
Is the January 2027 payment the December 2026 benefit?
Yes, for Social Security. Benefits are paid the month after they are earned, so the payment issued in January 2027 covers December 2026, the first month the 2027 COLA applies under 42 U.S.C. 415(i)(2)(B). Supplemental Security Income works differently; it pays for the current month, so its January payment already carries the new rate, and a holiday shift moves that payment to December 31, 2026.
When will the 2027 COLA be announced?
The Social Security Administration announces the cost-of-living adjustment in mid-October 2026, once the September Consumer Price Index for Urban Wage Earners and Clerical Workers is published. That figure sets the percentage applied to the December 2026 benefit. The exact size is not yet known; finbarrow tracks the running calculation as new inflation data arrives each month.
Educational content only. finbarrow is an independent editorial publication, not a licensed financial advisor, broker, tax preparer, or attorney. Verify rates and terms with the issuer or relevant regulator. See disclaimers and funding disclosures.