September 2018 SSDI Payment Schedule
Social Security Disability Insurance (SSDI) payments in September 2018 followed the standard monthly schedule based on your birth date. The Social Security Administration paid most beneficiaries between September 3 and September 21, 2018, with the exact date determined by which day of the month you were born.
The payment schedule worked the same way every month: people born on the 1st through the 10th received payments on the second Wednesday of the month, those born on the 11th through the 20th received payments on the third Wednesday, and those born on the 21st through the 31st received payments on the fourth Wednesday. In September 2018, this meant payments landed on September 12, September 19, or September 26, depending on your birth date.
If you received Supplemental Security Income (SSI) in addition to SSDI, or if you were a representative payee receiving benefits on behalf of someone else, your payment date may have been different. SSI payments typically arrived on the first of each month, or the first business day if the 1st fell on a weekend or holiday.
Key Takeaways
- SSDI payments in September 2018 were distributed between September 12 and September 26 based on your birth date, not on when you filed or when you started receiving benefits.
- Birth dates 1–10 received payment on September 12, birth dates 11–20 on September 19, and birth dates 21–31 on September 26.
- SSI payments arrived on September 1, 2018, regardless of birth date, because SSI follows a different schedule than SSDI.
- If your payment did not arrive on the expected date, the delay was usually caused by a bank processing issue or a change in your account information that Social Security had not yet processed.
How Birth Date Determined Your Payment Date
The Social Security Administration divided SSDI beneficiaries into three groups based on birth date to spread payments across the month and reduce processing strain. This system has remained consistent since 1997 and applied to all SSDI recipients unless they fell into a special category.
Your birth date group stayed the same every month. If you were born on March 15, for example, you received your SSDI payment on the third Wednesday of every month—September 19 in 2018, October 17 in 2018, and so on. You did not need to do anything to maintain this schedule; Social Security handled it automatically.
The only exception was if you had recently become a beneficiary. New SSDI recipients sometimes received their first payment on a different date than their regular schedule, depending on when Social Security processed their claim and when their first month of benefit may be able to access began.
What to Do If Your September 2018 Payment Was Late
If your SSDI payment did not arrive by the end of the business day on your scheduled date, the first step was to check your bank account online or call your bank to confirm the deposit had not posted yet. Bank processing delays sometimes meant a payment arrived a day or two after Social Security sent it, particularly if you used a smaller bank or credit union.
If your bank confirmed no deposit had arrived, you could check the status of your payment through your Social Security account online at ssa.gov, or by calling Social Security's main line at 1-800-772-1213. Social Security could tell you whether the payment had been issued and, if so, when it was sent to your bank.
Common reasons for late payments included a change in your bank account information that Social Security had not yet updated, a hold placed on your account by your bank, or a temporary processing error. If Social Security had issued the payment but your bank had not received it after five business days, you could request that Social Security issue a replacement payment or investigate the missing deposit with your bank.
September 2018 Calendar and Payment Dates
| Birth Date Range | Payment Day in September 2018 | Day of Week |
|---|---|---|
| 1st through 10th | September 12 | Wednesday |
| 11th through 20th | September 19 | Wednesday |
| 21st through 31st | September 26 | Wednesday |
| SSI recipients (all birth dates) | September 1 | Saturday |
Why Social Security Uses Birth Date Groups
Spreading payments across three Wednesdays each month reduced the number of transactions Social Security and banks had to process on any single day. Before 1997, all SSDI beneficiaries received payments on the same date, which created bottlenecks in the banking system and made it harder for Social Security to track and correct payment errors.
The birth date system also made it easier for beneficiaries to remember when to expect their payment. Once you knew your birth date group, you could predict your payment date for any month without checking a calendar or calling Social Security.
Difference Between SSDI and SSI Payment Dates in September 2018
SSDI and SSI are separate programs with different payment schedules. SSDI is based on your work history and Social Security taxes you or a family member paid. SSI is a needs-based program for people with low income and resources. In September 2018, SSDI payments followed the birth date schedule (September 12, 19, or 26), while SSI payments arrived on September 1.
Some people received both SSDI and SSI. If you were in this situation, you received two separate payments in September 2018: your SSI payment on September 1 and your SSDI payment on your birth date group's assigned Wednesday. The two payments appeared as separate deposits in your bank account.
Frequently Asked Questions
Did holidays affect the September 2018 SSDI payment schedule?
September 2018 had no federal holidays that fell on or near the payment dates, so the schedule ran as normal. If a payment date had fallen on a holiday or weekend, Social Security would have issued the payment on the business day before the holiday instead.
Why did my SSDI payment arrive on a different date than my friend's?
Your payment date was determined by your birth date, not by when you started receiving benefits or when you filed your claim. If your friend was born in a different week of the month, they were in a different payment group and received their payment on a different Wednesday.
Can I change my SSDI payment date?
No. Your birth date group is fixed and cannot be changed. However, you could request to change the day your payment is deposited (for example, from Wednesday to Friday) by updating your bank account information with Social Security, though the payment would still be issued on your birth date group's assigned date.
What if I received my September 2018 SSDI payment twice by mistake?
Contact Social Security when ready at 1-800-772-1213 to report the duplicate payment. Social Security will work with you to recover the extra payment, usually by reducing future payments or requesting a refund. Do not spend the duplicate payment, as you will be required to return it.
Did the September 2018 payment amount change from August?
Your monthly SSDI payment amount remained the same from month to month unless Social Security notified you of a change. Changes to your payment amount typically occurred only if your work earnings changed, you reached full retirement age, or Social Security made a correction to your record.