The 2027 Social Security COLA Is Projected at 3.6–3.8% — but Your Real Raise Is Smaller

Prefer video? Watch the short version on Instagram →

The 2027 Social Security cost-of-living adjustment is shaping up to be one of the bigger ones in years — an estimated 3.6% to 3.8%, which works out to roughly $75 to $78 more per month on the average retired-worker check.

Here's the part the headlines will skip: Medicare Part B premiums are going up in 2027 too, and that increase comes straight out of your Social Security check before it hits your bank account. So the raise you actually feel is closer to $70 a month, not $78.

That gap — between the number the news celebrates and the number that lands in the account — is why the COLA always feels a little disappointing. Let me walk through the real math, and exactly when we'll know the confirmed figures.

One reminder before we start: every 2027 number here is a projection, not a confirmed figure. The COLA is finalized in October 2026 and the Medicare premium in November 2026. Treat these as well-sourced estimates and verify your own check in your my Social Security account once the official numbers drop.

What the 2027 COLA is actually projected to be

Two respected groups have put out estimates, and they're close but not identical:

• AARP projects 3.6%, which would add about $75/month to the average benefit.
• The Senior Citizens League projects 3.8%, or roughly $77/month (lifting the average check from about $2,026 to $2,103).

Why the difference? Both are forecasting the same thing — the change in a specific inflation index — but they're using slightly different assumptions about how prices move over the summer months that haven't been reported yet. A few tenths of a percent in the inflation data shifts the estimate. Either way, both are a full point higher than 2026's 2.8% COLA.

How the COLA is actually calculated

The COLA isn't a policy decision someone makes — it's a formula. Social Security takes the CPI-W (the Consumer Price Index for Urban Wage Earners) for the third quarter — July, August, and September — and compares it to the same quarter a year earlier. That percentage change is the COLA.

Because the formula depends on July–September data, nobody has the real number yet. The Social Security Administration announces the official 2027 COLA in mid-October 2026 (expected around October 14, after the September inflation report). Everything before that is an estimate that can still move up or down.

The Medicare catch that quietly eats into every COLA

Now the part that surprises people every single year.

Most retirees have their Medicare Part B premium deducted directly from their Social Security check. When that premium goes up, your deposit shrinks by the same amount — silently, before you ever see the "raise."

For 2027, the Medicare Trustees Report projects the standard Part B premium rising from $202.90 to $209.50 a month — an increase of $6.60. That $6.60 comes out of your COLA increase automatically. Nobody sends you a bill; the deposit is just smaller than the gross number suggested.

There's a protection called the hold-harmless provision that stops your net Social Security check from actually going down when Medicare rises faster than your COLA. But it only matters when the premium hike is bigger than your dollar raise. In 2027, a ~$77 COLA increase dwarfs a $6.60 premium bump — so hold-harmless doesn't kick in, and the full $6.60 gets deducted from everyone's raise.

The real math on the average check

Here's the gross-to-net walk on a typical benefit:

Average 2026 monthly check	~$2,050
Gross COLA raise (3.6–3.8%)	+$75 to +$78
Medicare Part B increase	−$6.60
Net raise that hits your bank	~$70/month

Roughly $70, not $78. Over a year that's about $840 more, not the ~$936 the gross percentage implies. Still a raise — just a smaller one than the headline.

The high-income footnote (IRMAA)

If your income is above a certain threshold, the standard $209.50 isn't your premium. You pay an IRMAA — the Income-Related Monthly Adjustment Amount — an extra surcharge on top of the standard Part B premium based on your tax return from two years prior.

Higher earners can pay several times the standard premium, and those surcharge tiers tend to rise year over year too. So if you're in an IRMAA bracket, your Medicare offset could be bigger than $6.60, and your net raise correspondingly smaller. Check your bracket rather than assuming the standard number applies to you.

This isn't new — the pattern repeats every year

COLA and Medicare premiums climbing together isn't a 2027 quirk. It happens almost every year:

Year	COLA	Part B premium	Premium change
2024	3.2%	$174.70	+$9.80
2025	2.5%	$185.00	+$10.30
2026	2.8%	$202.90	+$17.90
2027 (proj.)	3.6–3.8%	$209.50	+$6.60

Every year the raise gets announced with a big number, and every year a piece of it goes back to Medicare before it reaches anyone. 2027's projected $6.60 is actually one of the smaller Medicare bites in recent memory — 2026 took nearly $18.

What to actually do with this

• Budget for ~$70/month, not the gross number. When the news trumpets "$77 raise," mentally subtract the Medicare piece so your planning matches reality.
• Verify your own check. The average is just an average. Log into my Social Security after October to see your specific COLA and, after November, your specific Medicare deduction.
• Don't pre-spend the raise. It's real money, but it's an inflation adjustment — it's meant to keep pace with prices you're already paying more for, not to fund something new.
• If you're in an IRMAA bracket, check your surcharge tier; your net raise may be thinner than the standard math shows.

When we'll know for sure

Mark two dates:

• Mid-October 2026 — the SSA announces the official 2027 COLA (expected ~October 14, based on the Q3 inflation data).
• November 2026 — CMS finalizes the actual 2027 Medicare Part B premium.

Both take effect with the January 2027 payment. Until those two releases land, every figure here is a projection — accurate as of July 2026, but not locked in.

Sources: AARP 2027 COLA preview, The Senior Citizens League, 2026 Medicare Trustees Report, and SSA benefit data.

The bottom line

Retirees feel like the COLA always underdelivers because the gross number gets the headline and the net number hits the account. A 3.6–3.8% raise is genuine — but Medicare takes its cut first, quietly, the same way it does every year. Plan around the ~$70, and the October announcement won't catch you off guard.

---

Comment "COLA" on the reel and I'll send you the confirmed number the day the SSA releases it in October. Follow @joinforbonus and subscribe below for the update — plain-English money, no hype.