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Social Security COLA 2027: How to Estimate Your New Monthly Benefit
A simple formula and calculator to estimate what your monthly Social Security benefit could be after a cost-of-living adjustment, with clearly illustrative examples.
Photo by Jakub Żerdzicki on Unsplash
This article is for general information. Figures and examples are illustrative and can change; check the linked sources before making decisions.
Short answer: to estimate your new benefit, multiply your current monthly benefit by 1 + (COLA ÷ 100). For example, a $2,000 benefit with a 2.5 % COLA becomes $2,050. That percentage is an assumption for illustration only: the 2027 COLA has not been announced as of October 12, 2026. For what is official and when to expect it, see the announcement guide.
The formula
New benefit = current benefit × (1 + COLA %)
Use the amount on your SSA notice, before deductions such as Medicare premiums. That gives you the gross increase.
Examples (made-up numbers)
These use invented benefits and hypothetical percentages. They are not forecasts.
- $1,500 with 2.0 % → $1,530.00 (+$30.00 a month, +$360.00 a year)
- $2,000 with 2.5 % → $2,050.00 (+$50.00 a month, +$600.00 a year)
- $2,500 with 2.8 % → $2,570.00 (+$70.00 a month, +$840.00 a year)
For a real reference, the official 2026 COLA was 2.8 %, according to the SSA.
Why your real number may differ
The percentage isn't final until the SSA announces it. Small rounding differences can occur. If Medicare Part B is deducted from your payment, a premium increase lowers your net deposit, and part of your benefits may be taxable. This calculation only applies to the amount you already receive.
You'll find your real number in your COLA notice from the SSA, usually sent late in the year, or in your my Social Security account.
Why the number in your bank account may differ
The COLA increases your gross benefit. What reaches your account can be smaller because some amounts are deducted from the benefit, such as a Medicare premium. Here is a made-up example to show the logic:
| Item | Amount |
|---|---|
| Current gross benefit | $2,000.00 |
| After an assumed 2.5% COLA | $2,050.00 |
| Assumed deduction (example only) | $200.00 |
| Deposit before the COLA | $1,800.00 |
| Deposit after the COLA, if the deduction stayed the same | $1,850.00 |
If the deduction rises too, the deposit grows by less than the headline increase. Check the notice from the Social Security Administration for your exact figures once it is issued.
Where to find your own numbers
Your current benefit is on your benefit letter or your online account. Use that gross amount in the calculator above and treat the result as an illustration, not a promise.
Frequently asked questions
Does everyone get the same increase?
The percentage is the same, but the dollar amount depends on each person's benefit.
Can I use this for SSI?
The formula works for any benefit adjusted by the COLA, including SSI federal payment levels, but SSI has its own rules. Check with the SSA.
