The December 2018 COLA was not retroactive — you received the increase starting with your January 2019 payment

Social Security announced the December 2018 Cost of Living Adjustment (COLA) in October 2018. The 2 percent increase took effect on January 1, 2019, meaning your first payment at the higher rate arrived in January 2019, not in December 2018. You did not receive a lump sum for the months between December 2018 and January 2019.

This is how COLA has always worked for SSDI. The adjustment is announced in the fall, takes effect on January 1 of the following year, and your benefit amount increases starting with the January payment. There is no retroactive payment to cover the gap.

If you were receiving SSDI in December 2018, your payment that month was at your old rate. Starting January 2019, every payment reflected the 2 percent increase. The difference between your December 2018 payment and your January 2019 payment showed you the dollar amount of the raise.

Key Takeaways

  • The 2 percent COLA increase for 2019 took effect on January 1, 2019, not retroactively in December 2018.
  • Your January 2019 SSDI payment was the first one to include the higher benefit amount.
  • Social Security does not issue retroactive COLA payments to cover the months before the January effective date.
  • You can see the exact dollar increase by comparing your December 2018 payment stub to your January 2019 payment stub.

Why COLA takes effect in January, not when it is announced

Social Security announces each year's COLA in October so people have time to plan. But the actual increase does not go into effect until January 1. This timing is set by federal law — COLA adjustments always become effective on the first day of the year, regardless of when the announcement happens.

The reason for this delay is administrative. Social Security needs time to reprogram payment systems, notify beneficiaries, and update records for millions of people. A January start date gives the agency the time it needs to make the change across all programs at once — SSDI, SSI, and retirement benefits.

How to verify the 2018 COLA increase on your payment records

You can confirm the increase by looking at your payment history on your Social Security account at ssa.gov. Log in, go to "Benefit Verification Letter" or "Payment History," and compare the amounts from December 2018 and January 2019. The difference is your 2 percent raise in dollars.

If you receive a paper check or direct deposit statement, keep your December 2018 and January 2019 stubs side by side. The January amount should be roughly 2 percent higher. For example, if your December payment was $1,000, your January payment should have been approximately $1,020.

If the January payment did not increase, or if the increase was smaller or larger than 2 percent, contact Social Security at 1-800-772-1213 to ask why. There may be a separate reason your benefit changed — a work report, a medical review, or a change in your household.

What happens if you were not receiving SSDI in December 2018

If your SSDI began in January 2019 or later, your first payment already included the 2 percent COLA increase. You do not receive a separate adjustment — the benefit amount Social Security tells you is the post-COLA amount.

If your SSDI began in 2020 or later, your first payment included the COLA for that year. Each year you receive SSDI, your January payment reflects whatever COLA was announced for that year.

COLA and work incentives or other benefit changes

The 2018 COLA increase is separate from any other changes to your benefit. If your SSDI amount went up or down between December 2018 and January 2019 for a reason other than COLA — such as a return-to-work report, a medical review, or a change in your Supplemental Security Income (SSI) — those changes happened at the same time but are not part of the COLA itself.

If you reported work income in late 2018, Social Security may have adjusted your benefit in January 2019 along with explore the COLA. The two changes appear on the same payment, which can make it hard to see which part is the COLA and which part is the work adjustment. Your payment notice should break down the reason for any change.

Frequently Asked Questions

Can I get a retroactive payment for December 2018 if I did not receive the COLA increase?

No. COLA is never retroactive. If your January 2019 payment did not include the 2 percent increase, contact Social Security to find out why. There may be a hold on your account, a pending medical review, or a work-related adjustment. Social Security can explain what happened and whether your benefit should have increased.

What if I was in a work incentive program in December 2018?

The 2018 COLA still applied to your SSDI benefit in January 2019, even if you were using a work incentive like a trial work period or extended may be able to access. Work incentives do not prevent COLA increases. Your benefit went up by 2 percent, and your work earnings were handled separately.

Does the 2018 COLA affect my Medicare or Medicaid?

A COLA increase to your SSDI benefit does not change your Medicare coverage — you keep the same Medicare Part A and Part B. For Medicaid, the effect depends on your state and whether you are on SSI as well as SSDI. Contact your state Medicaid office or Social Security to learn how the increase affects your coverage.

If I appeal a benefit decision, does the COLA explore to the back pay?

Yes. If you win an appeal and receive back pay for months before January 2019, those earlier months are paid at the old rate. Months from January 2019 onward are paid at the 2 percent higher rate. Your back pay notice will show the breakdown by month.