Social Security COLA Calculator
| Current benefit | +2.0% | +2.4% | +2.8% (2026) | +3.2% |
|---|---|---|---|---|
| $1,200 | $1,224.00 | $1,228.80 | $1,233.60 | $1,238.40 |
| $1,600 | $1,632.00 | $1,638.40 | $1,644.80 | $1,651.20 |
| $2,000 | $2,040.00 | $2,048.00 | $2,056.00 | $2,064.00 |
| $2,400 | $2,448.00 | $2,457.60 | $2,467.20 | $2,476.80 |
Every October, the Social Security Administration announces the cost-of-living adjustment - the COLA - and every January, benefits rise by that percentage. The math is one multiplication: your current benefit times the COLA. The uncertainty is the other input: the COLA itself is computed from third-quarter CPI-W inflation data and lands mid-October (the 2026 COLA was 2.8%, effective December 2025; the 2027 figure arrives around mid-October 2026), which is why every projection you see right now is a guess wearing a suit.
Bottom line: a $2,000 benefit at the official 2.8% COLA becomes $2,056 - $56 more per month, $672 across the year. At a 3.2% projection it is $64 a month; at 2.0% it is $40. The calculator runs any combination, and the table below maps the common benefit levels against the plausible COLA band.
The honest part: the COLA is not a raise, it is a price-adjuster - it tracks inflation so purchasing power stays flat, and one big bite comes straight off the top: Medicare Part B premiums are usually deducted from Social Security checks, and they typically rise too (though a hold-harmless rule protects anyone whose premium jump would exceed their COLA). The deposit that lands in your bank grows by less than the headline percentage more often than not.
How to use
- Enter your current gross monthly benefit (the number on your award letter, before Medicare deductions).
- Enter a COLA percent - the 2026 official figure was 2.8%; for the 2027 announcement, use a projection until mid-October makes it official.
- Read the new monthly benefit and the monthly and yearly raise, then check the table to see the whole plausible band at a glance.
Frequently asked questions
When is the 2027 Social Security COLA announced?
Mid-October 2026, most likely - the COLA is computed from the Consumer Price Index for Urban Wage Earners (CPI-W) for July, August and September, and once September's CPI-W prints, the arithmetic is locked. The announcement typically lands in the second half of October, the increase applies to benefits payable for December 2026 (the first check arrives January 2027), and your new award letter confirms your personal figure in December. Until then, every '2027 projection' - including any number you type here - is an estimate built on incomplete inflation data.
Why does my check go up less than the COLA percentage?
Medicare Part B premiums are deducted from most beneficiaries' Social Security checks, and those premiums usually rise in the same January. If the Part B increase is smaller than your COLA, you keep the difference; if it would exceed your COLA, a hold-harmless provision caps the deduction so your net check does not shrink - the increase is absorbed rather than delivered. New enrollees and higher earners are not always protected by hold-harmless, which is why two people with identical benefits can see different deposits.
How exactly is the COLA rounded on my check?
The COLA is applied to your Primary Insurance Amount, and SSA rounds the resulting benefit to the next lower multiple of ten cents - so a computed $2,056.37 pays as $2,056.30. On top of that, the increase itself is measured against your PIA, not any supplemental amounts, and if your benefit was already rounded or reduced for early claiming, the percentage applies to that same base. The calculator shows straight multiplication; your December award letter shows the rounded result with every deduction listed.
Why does the COLA use CPI-W and not the seniors' price index?
The 1975 formula ties COLAs to CPI-W, an index tracking urban wage earners - a basket that spends less on healthcare, which rises faster for retirees. Advocates have pushed CPI-E (an experimental elderly-focused index, where healthcare weighs roughly twice as heavy) for decades; over a long retirement, the gap compounds into materially lower purchasing power. Switching would require Congress, and every scoring of the change says it costs billions - so CPI-W persists, and the COLA remains an inflation-matcher, not a seniors'-cost matcher.