COLA raises your Social Security check, but Medicare premiums may take some of it back

COLA stands for Cost of Living Adjustment. Each year, Social Security increases your benefit by a percentage meant to match inflation. In 2024, that increase was 3.2 percent. Medicare Part B and Part D premiums also change each year, and they are deducted directly from your Social Security payment before you see the money. The result: your COLA raise might be smaller than the headline number, or you might see almost no raise at all if Medicare premiums rise faster than your COLA does.

This matters because most people on Social Security are also on Medicare. You do not choose whether to have the premium deducted — it happens automatically. Understanding how both work together helps you know what to expect in your bank account each month.

Key Takeaways

  • COLA is a percentage increase to your Social Security benefit, announced each October and effective the following January.
  • Medicare Part B and Part D premiums are subtracted from your Social Security payment, so a COLA raise does not always mean more money in your account.
  • The "hold harmless" rule protects most people from paying higher Medicare premiums than they did the year before, but it does not apply to Part D or to people with higher incomes.
  • If you are not yet on Medicare or have other income sources, your COLA raise goes to you in full.
  • Your COLA percentage is the same for everyone, but the dollar amount varies based on how much you were receiving before the increase.

When COLA is announced and how much you receive

The Social Security Administration announces the COLA percentage in mid-October each year. The increase takes effect on your January payment. The percentage is based on inflation data from July, August, and September of that year, measured by the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W).

Your actual dollar increase depends on your current benefit amount. If you receive $1,500 per month and COLA is 3.2 percent, you get an extra $48. If you receive $3,000 per month, you get an extra $96. The percentage is the same; the dollar amount scales to your payment.

COLA does not apply to Supplemental Security Income (SSI), which is a separate need-based program. SSI recipients may see a small increase in January, but it is not tied to the same formula.

How Medicare premiums reduce your COLA raise

Part B premiums (which cover doctor visits and outpatient care) and Part D premiums (which cover prescription drugs) are deducted from your Social Security payment each month. When these premiums increase, the deduction increases too. If your COLA raise is $48 but your Part B premium goes up by $60, your net payment actually decreases by $12.

In recent years, Part B premiums have risen faster than COLA in some years and slower in others. Part D premiums vary by plan and by region, so the impact on your payment depends on which plan you chose. If you are on Original Medicare with no Part D coverage, you only see Part B deducted.

The Medicare program announces Part B premium changes in October, the same month as the COLA announcement. Part D premiums are announced by individual insurance companies and vary widely.

The "hold harmless" rule and who it protects

The hold harmless rule says that your Social Security payment cannot go down because of a Medicare Part B premium increase. If your COLA raise is smaller than the Part B premium increase, Social Security covers the difference so your payment stays flat or goes up slightly.

This rule applies to most people on both Social Security and Medicare Part B. It does not apply to people who have higher incomes (above $97,000 for single filers in 2024, though this threshold changes yearly), because they pay higher Part B premiums based on income. It also does not apply to Part D premiums, which can increase without triggering hold harmless protection.

Hold harmless is automatic — you do not need to do anything. But it only protects your payment from going down. It does not may provide that your COLA raise reaches your bank account in full.

What happens if you are not yet on Medicare

If you are receiving Social Security but not yet enrolled in Medicare, your COLA raise goes to you in full. No premiums are deducted. This is common for people who claim Social Security before age 65, or for people who delayed claiming and are still working.

Once you enroll in Medicare Part B, the premium deduction begins. If you enroll at 65 (the standard age), this usually happens in your first month of Medicare coverage. If you enroll later, the deduction starts when your coverage begins.

If you have other income sources besides Social Security — such as a pension, wages, or investment income — Medicare premiums are not deducted from those. They are only deducted from Social Security.

Income-related premiums and higher earners

If your modified adjusted gross income (MAGI) exceeds certain thresholds, you pay a higher Part B premium. In 2024, single filers with MAGI above $97,000 pay more. Married couples filing jointly with MAGI above $194,000 pay more. These thresholds increase each year.

If you are subject to income-related premiums, the hold harmless rule does not apply to you. Your Part B premium can increase even if your COLA raise is smaller. This is one reason to understand your income situation before you claim Social Security or enroll in Medicare.

Part D premiums are always income-related for people with higher incomes, and hold harmless does not protect them either.

How to find out your COLA raise and Medicare deductions

Social Security sends a notice in December showing your January payment amount and any COLA increase. This notice also shows your Medicare Part B premium for the coming year. You can log into your Social Security account at ssa.gov to see this information early, usually in November.

Your Medicare Part D premium depends on which plan you chose. Your insurance company sends a separate notice, usually in October or November, showing your premium for the coming year. If you want to change plans, the annual enrollment period runs from October 15 to December 7 each year.

If the numbers do not match what you expected, contact Social Security at 1-800-772-1213 to ask about your COLA calculation or Medicare deduction.

Frequently Asked Questions

Can I get my COLA raise without Medicare premiums being deducted?

Only if you are not enrolled in Medicare Part B. Once you enroll, the Part B premium is deducted automatically. You cannot opt out of the deduction while staying on Medicare. You can choose not to enroll in Part D, which would avoid that premium deduction.

What if I think my COLA calculation is wrong?

Call Social Security at 1-800-772-1213 and ask them to review your benefit statement. Bring your December notice showing the COLA amount and your January payment. Social Security can explain how the calculation was done and whether an error occurred.

Do I get COLA if I am on Supplemental Security Income?

SSI is a separate program from Social Security retirement or disability benefits. SSI recipients may see a small annual increase in January, but it is not based on the same COLA formula. Contact Social Security to learn about SSI payment changes.

Can I delay my COLA to avoid a Medicare premium increase?

No. COLA is applied to all beneficiaries in January. You cannot choose to skip it or delay it. If you are concerned about the net effect on your payment, contact Social Security to discuss your specific situation.

What if my Part B premium increases more than my COLA?

The hold harmless rule protects most people by ensuring your payment does not go down. If you are subject to income-related premiums, hold harmless does not apply, and your payment could decrease. Review your income situation or contact Social Security to understand your protection status.