Projected COLA for Social Security: Estimates, Timing, and Medicare

The projected Social Security cost-of-living adjustment for 2027 falls somewhere between 3.3% and 4.7%, according to forecasts published in mid-2026. The Social Security Administration will announce the official figure on October 14, 2026, and the increase will show up in January 2027 benefit payments.¹ Whatever the number ends up being, it will be noticeably larger than the 2.8% adjustment currently in effect for 2026.²

Where the 2027 Projections Stand

Several organizations track the monthly inflation data that feeds the COLA formula and publish running estimates. Their numbers have climbed sharply through the spring of 2026:

The Senior Citizens League (TSCL), a retiree advocacy group, moved from a 2.8% projection in January and February 2026 up to 3.9% in April and 3.8% in May. Its own COLA Watch page has since listed 3.3%.³⁴
Independent Social Security and Medicare analyst Mary Johnson projects 4.7% and has said there is “considerable likelihood” the final figure could go even higher depending on where gasoline prices settle during the third quarter.⁵
FedWeek, using inflation data through May 2026, puts its running count at 3.6%.⁶
The Military Officers Association of America estimated 2.8% as of March 2026, before the spring price spike.⁷

The spread reflects genuine uncertainty rather than disagreement about the math. The Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) rose 4.4% over the twelve months ending in May 2026.⁵ What the actual COLA turns out to be depends on what prices do next.

Why Summer 2026 Decides the Number

The COLA is set by a formula written into federal law in the early 1970s, not by administrative discretion.² SSA takes the average CPI-W for July, August, and September of the current year and compares it to the same three-month average from the year before. The percentage change, rounded to the nearest tenth, is the COLA.⁸

Everything published before October is an estimate based on the trajectory of prices so far. Third-quarter CPI-W data is what matters.

What Is Pushing the Estimates Higher

Fuel is the biggest single factor. Over the twelve months through May 2026, fuel oil prices rose 64.1% and gasoline climbed 40.7%, driven in large part by disruptions around the Strait of Hormuz tied to the conflict involving Iran.⁵ The national average gasoline price hit $4.56 by late May, with some forecasts warning of $5.00 or more if the strait stayed closed.⁹

Then came a partial reversal. By late June 2026, a U.S.-Iran deal to reopen the strait helped drop the national average to $3.86, more than 60 cents below the prior month.¹⁰ If gasoline keeps easing through July, August, and September, the final COLA leans toward the low end. If it rebounds, the number moves up. That is why Johnson has flagged fuel as the wildcard.

Tariffs have added their own pressure. A Federal Reserve analysis found that tariffs in place through February 2026 had already lifted core goods prices by 3.1%, with the pass-through to consumers largely complete.¹¹ Research from the Federal Reserve Bank of New York found more than 90% of tariff costs were borne by domestic consumers and businesses.¹² Whether Section 122 tariffs imposed after the Supreme Court’s February 2026 ruling in Learning Resources, Inc. v. Trump expire on July 23, 2026, get extended, or are replaced will shape the third-quarter readings.¹³

Other categories are contributing as well. Airfares rose 25% year-over-year, and housing, utilities, and healthcare costs have kept climbing.⁵³ The Peterson Institute for International Economics warned in 2026 that inflation could surprise higher, potentially topping 4% by year-end.¹⁴

What the Increase Would Mean in Dollars

The average monthly Social Security retirement benefit was roughly $2,079 in early 2026.¹⁵ Applying the three scenarios:

At 3.3%, an increase of about $69 a month, taking the average to roughly $2,148.
At 3.8%, an increase of about $79 a month. TSCL has estimated this scenario would raise the average benefit from $2,081 to $2,162.¹
At 4.7%, an increase of about $98 a month, taking the average to roughly $2,177.

The same percentage applies to Supplemental Security Income. The current maximum federal SSI payment is $994 a month for an individual and $1,491 for a couple.¹⁶ A 3.8% adjustment would push those to roughly $1,032 and $1,548.

The 2026 COLA reached about 75 million Americans, including nearly 71 million Social Security beneficiaries and nearly 7.5 million SSI recipients.¹⁷

Who Else Gets the Same Adjustment

Military retirement pay and VA disability compensation use the same CPI-W-based formula, so the October announcement applies to those benefits too.⁷

Federal civilian retirees under the older Civil Service Retirement System (CSRS) receive the full COLA. Retirees under the Federal Employees Retirement System (FERS), which covers most workers hired after 1984, get a reduced version. If the COLA exceeds 3%, FERS retirees receive one percentage point less than the full amount. If it falls between 2% and 3%, they get a flat 2%.¹⁸ A 3.8% COLA would translate to 2.8% for FERS annuitants. FERS retirees are also generally ineligible for any COLA until age 62.¹⁹

The Medicare Part B Offset

A bigger COLA does not automatically mean a bigger net check. Medicare Part B premiums are usually deducted straight from Social Security payments, and when premiums rise they absorb part of the raise. The Social Security Act’s “hold-harmless” provision keeps a Part B premium increase from exceeding the dollar amount of a beneficiary’s COLA increase, which protects most current enrollees from seeing their net payment drop.²⁰ The protection does not apply to new enrollees, to high-income beneficiaries paying income-related surcharges (IRMAA), or to people whose premiums are paid by Medicaid. For those groups, a large Part B increase can eat a substantial share of any COLA.

Announcement and Payment Timing

SSA is scheduled to release the official 2027 COLA on October 14, 2026.¹ Personalized notices go out to beneficiaries in December 2026. SSI recipients will see the higher payment on December 31, 2026, and Social Security beneficiaries will receive the increase starting with their January 2027 payments.²¹

1
Yahoo Finance. 2027 Social Security COLA Announcement
2
Social Security Administration. Latest Cost-of-Living Adjustment
3
Kiplinger. Social Security COLA 2027
4
The Senior Citizens League. COLA Watch
5
CNBC. Social Security COLA 2027 Inflation Estimate
6
FedWeek. 2027 COLA Count Jumps Again, Hits 3.6 Percent
7
MOAA. Where Will Your COLA Land in 2027
8
AARP. Social Security COLA History
9
CBS News. Gas Prices Memorial Day 2026
10
AAA. National Average Drops Below $4 Gallon as Summer Travel Heats Up
11
Federal Reserve. Detecting Tariff Effects on Consumer Prices in Real Time
12
Levy Economics Institute. The US Supreme Court Rules and Future Prospects of Trump’s Tariff Gambit
13
Tax Policy Center. How the Supreme Court’s IEEPA Ruling and New Section 122 Tariffs Reshape Costs Across Industries
14
Peterson Institute for International Economics. Risk of Higher US Inflation 2026
15
Kiplinger. What Is the Average Social Security Check by Age
16
Social Security Administration. SSI Federal Payment Amounts
17
Social Security Administration. 2026 COLA Announcement
18
National Active and Retired Federal Employees Association. Up-to-Date Information
19
Office of Personnel Management. Cost-of-Living Adjustments FAQ
20
Congressional Research Service. Medicare Part B Premiums and Social Security COLAs
21
CNBC. Social Security COLA 2027