Social Security COLA for 2027: A 3.6% Increase, What It Adds and When It Arrives

How much does the 2027 COLA add to a monthly benefit?

Multiply the monthly benefit before deductions by 0.036. The table works that out for benefits from $1,500 to $5,000 a month. The starting figure is the gross benefit for 2026, the amount before Medicare premiums and any tax withholding come out.

Gross benefits, before the Medicare Part B premium and any income tax withholding. Computed from the 3.6% adjustment.

Social Security estimates that the average retired worker's benefit rises by $75, from $2,095 to $2,170 a month. A couple who each receive $3,000 gain $216.00 a month between them, or $2,592.00 over the year.

Why your own figure may differ by a few cents

Social Security does not multiply last year's payment by 1.036. It applies the increase to your primary insurance amount, the benefit payable at full retirement age, and cuts the result to the next lower multiple of 10 cents. Any reduction for claiming early or credit for claiming late is then applied to that new amount. Finally, after the Medicare premium is deducted, the monthly payment is cut to the next lower whole dollar. Each step rounds down, never up, so the amount deposited can be up to a dollar less than straight multiplication suggests. The table follows the first rule and treats the benefit shown as the amount being adjusted.

Sources: Federal Register, Cost-of-Living Increase and Other Determinations for 2027 (91 FR 67380); SSA, 2027 cost-of-living adjustment fact sheet (average benefit); rounding rules in 42 U.S.C. 415(g) and 415(i)(2)(A)(ii).

When does the 2027 COLA show up?

The adjustment takes effect with the benefit for December 2026. Social Security pays each month's benefit in the following month, so the first payment that includes it arrives in January 2027. The day depends on the birthday of the worker whose earnings record the benefit is paid on. A spouse or survivor is paid on the worker's schedule, not their own.

The last two rows fall in December because of the calendar. When a payment day lands on a weekend or a federal holiday, the payment is made on the last business day before it. January 1, 2027 is a holiday and January 3 is a Sunday, so both payments move to Thursday, December 31. The December 31 payment is the January payment made early; it is not an extra one.

Social Security tells each person their new amount before it is paid. The notice appears in the Message Center of an online my Social Security account from late November, and paper notices are mailed during December to people who have not chosen paperless delivery. For people on Medicare, the 2027 premium is shown in the same place. That notice is the authority on your own figure.

Sources: 20 CFR 404.1807 (payment days); SSA press release, October 14, 2026 (notices); Federal Register notice (SSI paid December 31).

How is the COLA calculated?

No one at Social Security chooses the figure. The Social Security Act sets a formula, in place since 1975, and the agency applies it. The measure is the Consumer Price Index for Urban Wage Earners and Clerical Workers, the CPI-W, published monthly by the Bureau of Labor Statistics. The COLA is the percentage by which the average CPI-W for July, August and September of this year exceeds the average for the same three months of the last year that produced a COLA. The result is rounded to the nearest tenth of a percent.

Dividing 328.746 by 317.265 gives an increase of 3.62%, which rounds to 3.6%. Because the September index is the last input, the COLA is announced on the morning the September CPI is released, which was October 14 this year.

Three features of the formula are worth knowing.

• It looks at one quarter only. Prices from October through June affect the COLA only through where they leave the index by the following summer. A price spike in winter that has faded by July adds nothing.
• It cannot go below zero. If the third-quarter average does not rise, benefits stay level. The next COLA is then measured from the last quarter that did produce an increase, so the index has to pass its earlier peak first.
• It has a solvency brake that is not in use. If the trust funds held less than 20% of a year's costs, the COLA would be the lower of price growth and wage growth. The ratio for 2026 was 151.3%, so the limit did not apply.

Sources: Federal Register notice (index values and computation); BLS Consumer Price Index release, October 14, 2026; 42 U.S.C. 415(i).

What have past COLAs been?

The table lists every adjustment paid from January 2001 through January 2027. Over those 27 years the COLA averaged 2.6%; over the last ten it averaged 3.4%. The 2027 figure of 3.6% is above both averages, and only 4 of the 27 years were higher.

The last column compounds the percentages and ignores the rounding of individual benefits. Source: SSA, Cost-of-Living Adjustments series, which lists each COLA under the year it was determined.

A benefit of $1,000 a month at the end of 2000 has grown to about $2,006 from COLAs alone, a rise of 101%. There was no adjustment in 3 of the years: January 2010, 2011 and 2016. The largest in the period was 8.7% for January 2023, after the inflation of 2022. The largest since automatic adjustments began in 1975 was 14.3%, determined in 1980.

A COLA restores purchasing power that has already been lost. It is paid after the prices have risen and is sized to match them, so a large COLA is a sign of a hard year for household budgets and not a raise. To see what a given sum from an earlier year is worth in today's dollars, use the inflation calculator.

How much of the increase will Medicare Part B take?

Most people who are on Medicare and drawing Social Security have the Part B premium deducted from the monthly benefit. The COLA raises the gross benefit; the premium usually rises in the same January; the deposit goes up by the difference. In 2026 the standard premium is $202.90 a month.

The Medicare Trustees Report transmitted in June 2026 projected a standard premium of $209.50 a month for 2027, which would be $6.60 more than this year. If CMS sets the premium at that level, the arithmetic for the average retired worker would be:

The 2027 premium is a projection made in mid-2026. CMS sets the actual amount from later cost data and it can differ. Before the whole-dollar rounding of the payment. Source for the projection: 2026 Medicare Trustees Report, tables V.E2 and V.E3 (intermediate estimates).

On those numbers the amount deposited would rise by $68.80 a month, or about 3.6%. The projected premium increase would take 9% of the gross increase and leave the rest. The IRMAA brackets page will carry the official 2027 premium and surcharge tables once CMS publishes them.

The hold-harmless rule

The law does not let a Part B premium increase reduce a Social Security check. For a person whose premium is deducted from their benefit, the premium cannot rise by more than the dollar amount of their COLA. If it otherwise would, that person pays a reduced premium and the net benefit stays where it was. The test compares the December benefit after the premium with the November benefit.

In a year like this one the rule protects very few people. A 3.6% COLA produces more than $6.60 on any benefit above about $184 a month, so the projected premium increase would exceed the COLA only on very small benefits. The rule matters most in a year with no COLA or a very small one, when any premium increase would otherwise cut the check.

Who the rule does not protect

• Anyone who pays IRMAA. The statute applies the limit only to people whose premium is not income-adjusted. A household above the IRMAA thresholds pays the full increase in the standard premium and in the surcharge, whatever the COLA.
• People on Medicare who have not started Social Security. The protection depends on the premium being deducted from a benefit in both November and December. Someone who is 67, enrolled in Part B and delaying their claim is billed directly and pays the full premium.
• People new to either program. A person who starts Part B or starts benefits during the year has no November-to-December comparison to protect and pays the standard premium.

Source: 42 U.S.C. 1395r(f).

Do you get the COLA if you have not claimed yet?

Yes. This is the point about COLAs that is most often misunderstood, and it matters for anyone weighing when to claim. Cost-of-living adjustments are applied to your primary insurance amount starting with the year you turn 62, the first year of eligibility, whether or not you are collecting. The Federal Register notice says so directly: the 3.6% increase applies to workers whose eligibility, meaning reaching age 62, came before 2027.

So a person who turned 62 in 2026 or earlier and is waiting until 67 or 70 has not missed the 2027 COLA. It has been added to the benefit they will eventually claim, and so has every COLA since they turned 62. Take a hypothetical worker, past 62, with a full-retirement-age benefit of $3,000 who intends to claim at 70:

• The 3.6% COLA raises the full-retirement-age benefit from $3,000 to $3,108.00.
• Delayed retirement credits for 36 months add 24%. On the old amount that was $3,720.00 at 70; on the new amount it is $3,853.92.
• The COLA has therefore added $133.92 a month to the age-70 benefit, more dollars than it added for someone with the same record who claimed at full retirement age.

Because every claiming age receives the same percentage, the COLA does not tilt the decision toward claiming early. It does mean the larger delayed benefit carries a larger inflation adjustment in dollars each year. People who turn 62 in 2027 are the exception for this particular adjustment: their first COLA will be the one announced in October 2027. Their benefit formula uses the 2027 bend points shown below instead.

The Social Security break-even calculator compares two claiming ages with a COLA assumption you set, and when to claim Social Security covers the wider decision.

Source: Federal Register notice, “Title II Benefit Amounts”.

Does the COLA raise the tax on your benefits?

Often, yes. Social Security benefits are taxed by a formula based on combined income: adjusted gross income apart from benefits, plus tax-exempt interest, plus half of the benefits. Up to 50% of benefits are taxable once combined income passes $25,000 for a single filer or $32,000 for a couple filing jointly, and up to 85% above $34,000 or $44,000.

Those four figures are fixed in the tax code and are not indexed. Tax brackets and the standard deduction rise with inflation each year; these thresholds do not. Every COLA therefore pushes more of the benefit across them. Here is a hypothetical couple with $50,000 of other income and combined benefits of $4,000 a month:

The COLA added $1,728 of benefits and $734 of taxable income, about 43% of the increase. The share is below 85% here only because this couple is still in the phase-in range. A household already at the 85% ceiling has 85% of any COLA added to taxable income. A household well under the first threshold has none. The taxable Social Security calculator runs the worksheet for your own figures.

Source: IRS Publication 915. The example uses the federal worksheet only; some states tax benefits under their own rules.

CPI-W versus CPI-E: is the COLA measuring the right prices?

The CPI-W tracks the spending of households whose income comes mainly from wage and clerical work. Households living on retirement income are not the group it is built around. When automatic COLAs were written into law it was the only consumer price index the government published, and Social Security has continued to use it.

The Bureau of Labor Statistics also calculates a research index for Americans aged 62 and older, the R-CPI-E, often called the CPI-E. It reweights the same price data by what older households spend, and it has been published monthly back to December 1982. Its use for official purposes has been considered but not adopted, and the 2027 COLA uses the CPI-W as every COLA before it has.

BLS itself is cautious about the index. It describes the CPI-E as a research series and lists its limits: the spending weights come from about one-fifth of the survey sample, so they are less precise; the stores and the specific items priced are chosen to represent all urban households, not older ones; and senior discounts are counted only at the rate the general population uses them. An index designed for retirees from the ground up might give a different answer in either direction.

The practical point is that no index measures your own inflation. A household that owns its home outright, drives little and has high medical costs will experience price changes differently from the CPI-W basket. The COLA is an average-based adjustment, and a budget that depends on a few fast-rising costs should be tested against those costs directly.

Source: BLS, R-CPI-E research series.

What else changes for 2027?

The same announcement sets a group of figures that are tied to wages, not prices. They follow the national average wage index, which rose by more than prices did, so most of them go up by about 4.2%.

2027 figures: Federal Register, Cost-of-Living Increase and Other Determinations for 2027 (91 FR 67380). 2026 figures: SSA, 2026 cost-of-living adjustment fact sheet and the same notice.

• Taxable maximum. Earnings up to $192,300 are subject to the 6.2% Social Security tax in 2027. Earnings above the maximum are not taxed for Social Security and do not count toward benefits.
• Earnings test. This applies only to people who draw benefits before full retirement age and keep working. Under that age for the whole year, $1 of benefits is withheld for every $2 of earnings above $25,560. In the year full retirement age is reached, the limit is $67,920, only earnings before the birthday month count, and $1 is withheld for every $3 over.
• Bend points. These set the benefit formula for people who turn 62 in 2027: 90% of average indexed monthly earnings up to $1,340, 32% of the amount between $1,340 and $8,077, and 15% above that. Anyone who turned 62 earlier keeps the bend points of their own year and receives COLAs on the result.
• Work credits. One credit is earned for each $1,970 of earnings, up to four a year, so $7,880 of earnings in 2027 secures the full four.

Social Security also publishes a maximum benefit for a worker retiring at full retirement age. It is $4,152 a month in 2026 and $4,188 a month in 2027, according to the agency's fact sheet. Few people receive it: it takes 35 years of earnings at or above the taxable maximum.

Does the trust fund outlook put COLAs at risk?

The 2026 Trustees Report projects the combined retirement and disability trust funds can pay full benefits until 2034 and 83% of scheduled benefits after that, even if Congress does nothing. COLAs are part of scheduled benefits and would continue to be calculated each year under current law; what would fall, absent legislation, is the share of the scheduled amount that incoming payroll taxes could cover.

Source: SSA, 2026 Trustees Report release.

Frequently asked questions

Sources

• Federal Register, Cost-of-Living Increase and Other Determinations for 2027 (91 FR 67380) (PDF), published October 26, 2026: the 3.6% COLA, the CPI-W values, the taxable maximum, earnings test amounts, bend points, work credit amount and SSI rates for 2027.
• SSA press release, October 14, 2026 and SSA, 2027 cost-of-living adjustment fact sheet: the announcement, the average benefit before and after the COLA, and when notices are sent.
• SSA, Cost-of-Living Adjustments series: every COLA since 1975, used for the history table.
• Bureau of Labor Statistics, Consumer Price Index release of October 14, 2026: the September 2026 CPI-W.
• 42 U.S.C. 415: the COLA formula in subsection (i) and the rounding of benefits in subsections (g) and (i)(2).
• 42 U.S.C. 1395r(f): the hold-harmless limit on Part B premium increases and its exclusion of income-adjusted premiums.
• 20 CFR 404.1807: payment days by date of birth and the weekend and holiday rule.
• 2026 Medicare Trustees Report, tables V.E2 and V.E3 (intermediate estimates): the projected 2027 Part B premium, labelled as a projection above.
• IRS Publication 915: the thresholds and worksheet for taxing benefits.
• BLS, R-CPI-E research series: the experimental index for people 62 and older and its stated limitations.
• SSA, 2026 cost-of-living adjustment fact sheet: the 2026 figures shown for comparison.