2027 Social Security COLA Is 3.6%: Calculate Your Net Retirement Check

The 2027 Social Security cost-of-living adjustment is no longer a prediction: Social Security announced a 3.6% increase on October 14, 2026. Yet 3.6% is not the same as a 3.6% increase in the bank deposit you spend each month. Medicare deductions, tax withholding and household expenses can all change. Use a gross-to-net worksheet rather than treating the announcement as a spending raise.

What SSA announced—and when you will see it

SSA's October 14 announcement says nearly 72 million Social Security beneficiaries will see a 3.6% COLA beginning with benefits payable in January 2027. SSI increases follow a different payment schedule, with increased payments beginning December 31, 2026, for eligible recipients. This article focuses on Social Security retirement-benefit budgeting, not SSI eligibility or the rules for disability benefits.

SSA estimates the average retired-worker benefit will increase from $2,095 to $2,170 monthly, or $75, according to its 2027 fact sheet. Those are population averages, not a promise that your check will rise exactly $75. Another retiree's starting benefit, Medicare enrollment, income-related surcharges and withholding elections can all differ from yours. Personalized COLA notices are scheduled to appear online for eligible my Social Security users in late November, with mailed notices in December for people not enrolled in paperless notices.

Why the older estimate article is different

Before October, the right question was how a plan would survive several possible COLAs. Bullseye's pre-announcement 2027 COLA stress test covers that uncertainty. Now that SSA has announced the percentage, the question changes: how much of the new gross benefit is available after actual deductions and spending increases? The official COLA gives you one known input; it does not reveal every household's final net amount.

A gross-to-net worksheet you can use today

First, find the gross monthly benefit on your 2026 Social Security statement, not simply the amount that arrived at your bank. Multiply that gross amount by 1.036 for an approximate 2027 gross benefit. Compare it with your prior gross amount. SSA performs its own benefit calculations and rounding, so treat your worksheet as an estimate and use your personal notice for the exact figure.

Copy these lines for each beneficiary

1. A. 2026 gross monthly benefit: ____ (use your statement, not the deposit).
2. B. Provisional 2027 gross: A × 1.036 = ____; replace with your SSA notice when available.
3. C. 2027 amounts actually deducted from the benefit: Part B including any IRMAA already in that amount ____, Part D if deducted including any IRMAA already in that amount ____, any separately itemized IRMAA not counted above ____, elected tax withholding ____, other listed deductions ____; total ____. Enter each charge once—do not add a surcharge again if it is included in a premium on the notice.
4. D. Estimated 2027 monthly deposit: B − C = ____; compare against the 2026 gross minus its actual deductions, not against 2026 gross alone.
5. E. Costs paid outside the benefit: billed drug-plan premium ____, Medigap or other coverage ____, expected out-of-pocket care ____; subtract these from household cash flow, not from line D.

Next list deductions individually: Part B premium if taken from Social Security, any Part D premium paid by deduction, any Part D or Part B IRMAA, and voluntary federal tax withholding. Not every retiree has all these deductions. If your Part D insurer bills you directly, that premium still affects the budget even though it will not reduce your Social Security deposit. Keep other coverage costs, such as Medigap premiums or medical copays, in a separate spending column.

Illustration, not a 2027 premium forecast: A retiree's 2026 gross benefit is $2,000 a month. A simple 3.6% increase implies $2,072 gross, up $72 a month. Imagine their total 2027 deductions are $25 a month higher than in 2026 and their tax withholding stays unchanged. Their net deposit would rise about $47 monthly, not $72. If deductions instead rise $80, the deposit would be about $8 lower despite the higher gross benefit. These $25 and $80 figures are hypothetical tests, not official Medicare rates.

What is still unknown on October 19?

SSA's release says information about 2027 Medicare changes will be available at Medicare.gov and that a beneficiary's 2027 premium amount will be available through the my Social Security Message Center starting in late November. Do not plug a rumored Part B rate into a published COLA calculation as if it were official. Build a range for now, then update when your notice arrives. For many beneficiaries, Part B premiums are deducted from Social Security; some people pay differently. If a premium increase is unusually large, special hold-harmless rules may apply for some beneficiaries, but they have eligibility limits and do not protect everyone or every surcharge. Verify your specific case with Medicare or SSA.

Medicare open enrollment has already started and ends December 7. Drug-plan changes, pharmacy pricing or a shift between Medicare Advantage and Original Medicare can change your healthcare budget separately from SSA's COLA. If you plan to switch, compare the whole plan before the deadline; see the Medicare open-enrollment checklist for medical and drug questions. For the general interaction between Part B increases and a COLA, see the earlier 2026 Part B COLA squeeze guide; this worksheet instead uses the now-final 2027 COLA and your personal deductions. Your COLA should not be the sole reason to keep or change health coverage.

IRMAA looks backward, but the budget looks forward

Higher-income beneficiaries can owe income-related monthly adjustment amounts for Part B and Part D. In general, Medicare uses a tax return from two years earlier, so 2027 IRMAA usually reflects 2025 income rather than the 2027 benefit increase itself. A changed filing status or qualifying life-changing event may affect the assessment or appeal process. The IRMAA calculator can help frame income exposure. If you received an IRMAA notice, use its actual figures and discuss appeal eligibility with Social Security rather than assuming the COLA created the surcharge.

Reconcile the deposit with the household budget

Carry worksheet line D into a separate budget, then subtract line E's outside-paid costs. For an illustrative couple receiving $3,000 gross monthly in 2026, 3.6% adds $108 monthly or $1,296 annually before deductions. If their spending rises $150 monthly, the gap worsens by $42 a month even before any change in deductions. These are invented amounts, not an SSA payment forecast. Keep 2026 actual, 2027 notice-based, and an explicitly provisional higher-cost case side by side; do not count the same premium in the deposit and expense columns.

For couples, complete a separate worksheet for each person's actual benefit and deductions; do not use SSA's national average as either spouse's estimate. If you have not claimed, use your personal SSA estimate instead of this existing-beneficiary deposit worksheet. General claiming and survivor decisions belong in a separate plan, not in a 2027 COLA deposit estimate.

Using Bullseye to update a 2027 plan

Bullseye models Social Security with early or late claiming adjustments, applies inflation assumptions, tracks Medicare costs and federal/state taxes, and shows annual retirement projections through age 95. Record the exact 2027 benefit from your SSA notice beside your plan and review whether the plan's expected Social Security benefit input still reflects your assumptions. That input is a baseline monthly estimate, not an editable 2027-only SSA notice field. If testing 3.6% through a scenario inflation override, check its effects on other projected amounts: the override is system-wide, not a Social-Security-only COLA control. Keep the deposit worksheet outside Bullseye; its annual projection is not an SSA payment statement. Replace estimated healthcare costs with actual notices where the relevant expense input is available and avoid assuming 3.6% repeats forever.

Use Scenarios to contrast baseline expenses with a higher-Medicare-cost case and a lower-return case. See whether the remaining portfolio withdrawals, taxes and assets still support essential spending. Bullseye cannot issue your exact SSA benefit notice, predict future Medicare premiums or decide tax withholding for you. Use the official notices as inputs and ask an experienced tax or financial professional to check high-stakes decisions.

Your October-to-January action list

1. Save your current gross benefit and actual net deposit for each recipient.
2. Write down the 3.6% announced COLA and calculate an approximate gross change; label the result provisional.
3. Review 2027 Medicare health and drug options before December 7, recording premiums and expected out-of-pocket costs separately.
4. Check your personal SSA notice in late November or December for the exact gross benefit and Medicare deductions.
5. Update your household budget and withholding review after the actual numbers are available; revisit the plan in January when the first 2027 benefit is payable.

The 2027 COLA is meaningful inflation protection, but a spending decision needs more than the headline percentage. Separate what SSA has confirmed from what only your notices, plan and tax situation can establish. This article is general education, not individual Social Security, insurance, tax or investment advice.