Social Security COLA 2027: what your check really goes up by

The Social Security COLA for 2027 is 3.6%. The Social Security Administration announced it on 14 October 2026, and the question I see straight after is always the same: how much will my Social Security check actually go up in 2027?

The headline answer is "3.6% of your benefit". The answer that matters for a budget is smaller, because the number on the award letter is not the number that lands in your bank account. Medicare Part B comes out first, tax withholding may come out next, and the bills the raise is meant to cover have been rising too.

I read a lot of ledgers, and the people who feel the COLA are the ones who decide where it goes in November, not the ones who notice it in February. Below is how to work out your real raise and give it a job.

What the 3.6% COLA means in dollars#

According to the SSA's 2027 COLA fact sheet, the estimated average retired-worker benefit rises from $2,095 to $2,170 a month, about $75 more. An aged couple who both receive benefits goes from $3,238 to $3,355 on average. The SSI federal payment standard for an individual rises from $994 to $1,029.

The timing matters for your calendar:

• Social Security benefits increase with the January 2027 payments.
• SSI increases begin on 31 December 2026, which is why SSI recipients sometimes see two payments in December and none in January.
• Your personal COLA notice appears in the my Social Security Message Center from late November; paper notices arrive by mail in December.

The COLA is calculated from CPI-W, a price index for urban wage earners, measured from the third quarter of 2025 to the third quarter of 2026. It is a national average. Your own costs may have risen faster or slower, which is the part the rest of this post is about.

Why the deposit rises by less than the COLA#

Three things sit between the gross benefit and what you can spend.

Medicare Part B#

If you are on Medicare and the premium is deducted from your benefit, any premium increase comes straight off the raise. The standard Part B premium is $202.90 a month in 2026. The official 2027 figure was not out at the start of November; the Medicare trustees projected $209.50, as reported by MOAA on 17 June 2026. CMS usually confirms the number in November, and it will appear on your COLA notice.

Higher-income beneficiaries pay more than the standard premium (the income-related surcharge, IRMAA), so check your own notice rather than the standard figure. There is also a "hold harmless" rule that stops a Part B increase from making most people's net benefit go down year on year, but it does not stop the increase from eating part of the raise.

Federal tax withholding#

If you asked Social Security to withhold federal income tax (with form W-4V), the withholding is a percentage of the gross benefit: 7%, 10%, 12% or 22%. When the benefit rises, the amount withheld rises with it. Whether any of your benefit is taxable depends on your other income, so this line is zero for some people and significant for others.

Your bills#

The COLA is a response to prices that already went up. Your insurance renewal, your utility tariff and your grocery basket have been moving all year. The raise is only a raise if it is bigger than the increase in the bills it pays.

A worked example#

Here is one retiree, using the SSA's average figures: a gross benefit of $2,095 a month in 2026, the standard Part B premium deducted, and 10% federal tax withholding. For 2027 I will use the projected Part B premium of $209.50 and round the new benefit down to whole dollars: $2,095 × 1.036 = $2,170.42, so $2,170.

The award letter says $75 more. The bank account sees $60.90 more, because $6.60 goes to the higher premium and $7.50 to the higher withholding. Over a year that is $60.90 × 12 = $730.80.

Now the bills. Over the last twelve months, this person's ledger shows four recurring costs that went up:

• groceries, from $450 to $468 a month: +$18
• home insurance, from $120 to $131 a month: +$11
• electricity, from $95 to $101 a month: +$6
• phone and internet, from $110 to $115 a month: +$5

That is $18 + $11 + $6 + $5 = $40 a month of increases that already happened, many of them before the COLA arrives. Their real raise is $60.90 − $40 = $20.90 a month, or $250.80 a year.

That is the same idea as the real raise calculation for a paycheck: the percentage on the letter is the start of the sum, not the end of it.

If you are not on Medicare yet#

If you claimed early and are not on Medicare, or you pay your premium another way, the Part B line drops out. Without withholding either, the full $75 reaches the bank, and only the bill increases come off it: $75 − $40 = $35 a month in this example.

How to budget the 2027 raise#

The aim is to decide in advance, so the extra money has a job before it arrives.

Step 1: write down your own 2027 deposit#

When your COLA notice arrives in late November or December, it shows the new gross benefit, the Medicare premium and the net amount. Put the net amount in your budget as January's income. Until then, multiply your gross benefit by 1.036, round down, and subtract your best estimate of the deductions.

Step 2: list what went up this year#

Go through your recurring bills and compare this month with the same month last year. Insurance renewals, utility rates, prescription plan premiums and subscriptions are the usual suspects. If a bill went up and you have not checked whether you still need it, a subscription audit is a cheap place to recover a few dollars.

Step 3: give the remainder one job#

Whatever is left after the bill increases is your real raise. In the example it is $20.90 a month. Small, but it can do one useful thing:

• top up a sinking fund for an annual bill such as car insurance or property tax, so January's renewal does not hurt (see how to budget for irregular expenses);
• rebuild an emergency cushion if you drew on it this year; the guide to sizing an emergency fund works through how much;
• or pay a little extra on a card balance, where the interest saved is a guaranteed return.

Spreading it across five things usually means it does none of them.

Step 4: check in February#

Once the January and February deposits have landed, compare them with what you budgeted. If Part B or withholding came out differently, adjust once and leave it.

This is general education about budgeting, not advice about your benefits or taxes. Your COLA notice, Medicare and a tax professional can confirm what applies to you.

What to ask an advisor about it#

In Azno, your benefit deposits, recurring bills and goals sit in one ledger, so the four steps become questions you can ask:

• "My Social Security deposit goes from $1,682.60 to $1,743.50 in January. Which of my recurring bills went up this year, and by how much in total?" You see your own real raise, not the national average.
• "Compare each recurring bill this month with the same month last year and show me the three biggest increases." The answer points at real merchants and amounts.
• "Put my real raise into the car insurance sinking fund every month from January." This comes back as a proposal; nothing moves until you approve it.

If you want to see your own numbers before the January deposit, create a free account and import a few months of transactions. The COLA is the same 3.6% for everyone. What it is worth depends on your ledger.