Every year, millions of retirees eagerly await news about the next Social Security cost-of-living adjustment (COLA). It’s one of the few ways retirees can see their monthly checks increase after starting benefits, helping them keep pace with rising prices.

While the official 2027 COLA won’t be announced until October, early estimates are already beginning to take shape. These projections can provide a useful glimpse into what retirees might expect next year, but they’re far from set in stone.

In fact, the summer months we are in now have the biggest impact on the final COLA for 2027. Here’s why.

Read: The latest Social Security warning is here; retirees should pay attention

Why Social Security COLAs matter

Many people collect Social Security benefits for decades. As inflation pushes up the cost of groceries, housing, healthcare, and other everyday expenses, benefits would steadily lose purchasing power if they weren’t eligible for a raise.

COLAs are designed to help Social Security beneficiaries maintain their purchasing power by increasing benefits when consumer prices rise.

What the latest 2027 COLA estimates look like

Although an official Social Security COLA announcement is still months away, several respected forecasters have already released preliminary projections.

The Senior Citizens League, a nonpartisan advocacy group, currently estimates that the 2027 Social Security COLA will be 3.8% based on the latest inflation data available. Meanwhile, independent Social Security and Medicare policy analyst Mary Johnson projects a slightly lower 3.7% COLA.

While the difference between those estimates is small, both suggest that retirees could receive a larger adjustment than they did in 2026, when benefits rose just 2.8%.

The coming months matter the most

The Social Security Administration (SSA) doesn’t simply average inflation over the entire year to calculate COLAs. Instead, it uses a very specific formula.

Each year’s COLA is based on the average Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) during the third quarter of the year. Those figures are then compared with the third-quarter average from the previous year. If prices have increased, Social Security benefits receive a COLA reflecting that change.

Because of this system, the inflation readings released over the next few months are the most important ones to look at. Even modest changes in inflation during July, August, or September could move the final COLA estimate higher or lower.

A smaller COLA isn’t necessarily bad news

If you’re on Social Security, you may be hoping for a generous raise in the new year. But if the official COLA comes in lower, that’s not necessarily a negative thing.

Smaller COLAs are a clear indication of cooling inflation. If grocery prices, energy costs, and other everyday expenses aren’t rising as quickly, benefits don’t increase as much.

To put it another way, a 2.8% COLA in a year with moderate inflation may have the same financial impact as a 4.7% COLA in a year when prices are rising more quickly. And that ties into one key fact about COLAs all retirees should understand.

Social Security COLAs are not designed to help retirees get ahead financially. They’re simply meant to help beneficiaries keep up with rising costs.

The official announcement won’t come for a while

Since Social Security COLAs are based on third quarter inflation readings, the SSA won’t be able to officially announce a COLA until mid-October. That’s because September’s CPI-W can’t be calculated until data from the entire month is collected.

But whether the official COLA comes in at 3.7%, 3.8%, or something else entirely, it’s important to remember what COLAs are designed to accomplish. It’s also important to keep in mind that a smaller COLA isn’t necessarily bad news and a larger COLA isn’t automatically a win.

Of course, psychologically speaking, a larger Social Security COLA might sit better than a smaller raise. But the one thing to remind yourself is that at the end of the day, COLAs are a break-even tool. So if 2027’s ends up being less generous, it’s not that you’ve lost out on money. It’s that you simply didn’t require such a large raise because prices stayed fairly stable.

This story written for TheStreet by Nifty 50+