Every year, Social Security disability benefits have the potential to increase — not because Congress acts, but because federal law requires it. That automatic adjustment is called the Cost-of-Living Adjustment, or COLA. For people receiving SSDI (Social Security Disability Insurance), understanding how COLAs work — and what the 2018 and 2019 adjustments actually were — is a fundamental part of knowing how the program operates.
A COLA is an annual percentage increase applied to Social Security benefits to keep pace with inflation. The adjustment is tied to the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W), which measures changes in the cost of everyday goods and services. The Social Security Administration calculates each year's COLA by comparing CPI-W data from the third quarter (July–September) of the current year against the same period from the previous year.
If prices rise, benefits rise. If inflation is flat or negative, benefits stay the same — they never decrease due to a COLA calculation.
The purpose is straightforward: to protect the purchasing power of disability beneficiaries over time. Without COLAs, fixed monthly payments would gradually buy less as prices climbed.
The COLA that took effect in January 2018 was 2.0 percent. This was a meaningful increase after several years of very small or zero adjustments. The 2017 COLA had been just 0.3 percent, and 2016 and 2015 saw no increase at all.
For SSDI recipients, a 2.0 percent increase meant their monthly payment rose by a modest but real amount. The exact dollar change depended entirely on their individual benefit amount — which is calculated from their lifetime earnings history, not a flat rate.
To illustrate the range: if someone was receiving $1,000 per month in SSDI, the 2.0 percent increase added $20 per month. At $1,500 per month, the increase was $30. At $2,000, it was $40. These numbers are illustrative — actual SSDI payments vary widely from person to person. 📋
The COLA applied in January 2019 was 2.8 percent — the largest single-year adjustment since 2012. Rising inflation in 2018, particularly in energy and healthcare costs, drove the CPI-W higher and produced a more substantial adjustment.
For beneficiaries who had been on SSDI for years, this was a notable bump. Someone receiving $1,200 per month saw an increase of about $33. Someone at $1,800 saw roughly $50 added monthly. Again, these figures are examples — individual benefit amounts depend on work history and other factors.
SSDI benefits are calculated based on your Primary Insurance Amount (PIA), which derives from your Average Indexed Monthly Earnings (AIME) — a formula that accounts for your highest-earning years in covered employment. Once that base amount is established at the time of approval, COLAs compound on top of it each year.
This means a beneficiary who was approved in 2010 and has received every COLA since then has seen their payment adjusted multiple times, building on prior increases year after year.
| Year | COLA Percentage |
|---|---|
| 2015 | 0.0% |
| 2016 | 0.0% |
| 2017 | 0.3% |
| 2018 | 2.0% |
| 2019 | 2.8% |
| 2020 | 1.6% |
The 2018 and 2019 COLAs stand out as a two-year period of relative strength following years of near-zero increases.
It's worth noting that COLAs apply to SSI (Supplemental Security Income) too, not just SSDI. However, the two programs work differently.
SSDI is based on your work history and Social Security taxes paid. Your benefit reflects your earnings record. SSI is a needs-based program with a federally set maximum benefit amount. Both programs apply the same COLA percentage, but because SSI payments are calculated differently, the dollar impact looks different.
For people receiving both SSDI and SSI simultaneously — sometimes called concurrent beneficiaries — both payments adjusted in 2018 and 2019, though the interaction between the two programs involves income-counting rules that can complicate the net effect. 💡
A COLA does not affect your eligibility for SSDI. It does not reset your Medicare waiting period (which begins 24 months after your disability onset date for SSDI recipients). It does not change your Substantial Gainful Activity (SGA) threshold — the monthly earnings limit used to determine whether someone is working at a level that affects benefit status — though that threshold also adjusts annually and is separate from the COLA process.
COLAs also do not affect whether you're in a trial work period, an extended period of eligibility, or any other work incentive program. Those timelines and rules are governed by separate SSA policies.
The 2018 and 2019 COLAs were uniform percentages — every SSDI recipient received the same rate of increase. But the actual dollar amount added to a monthly check varied based on:
That last point mattered in both 2018 and 2019. Medicare Part B premium increases, which are often deducted directly from benefit checks, can partially or fully absorb a COLA increase for some beneficiaries — depending on their income level and whether the hold harmless provision applied to them.
The mechanics of COLAs are consistent and publicly documented. What's impossible to assess from the outside is how those mechanics interacted with any specific person's benefit amount, Medicare deductions, SSI eligibility, or state supplement status in 2018 or 2019. The percentage was the same for everyone — what it meant in dollars, and whether it was fully felt, depended entirely on the individual's own benefit structure.