SSA TREAS 310: What This Deposit on Your Bank Statement Means
Saw 'SSA TREAS 310' in your account? Here's exactly what it is, what the codes next to it mean, and what to do if the amount surprises you.
The short answer
SSA TREAS 310 is the transaction code your bank displays when theSocial Security Administration sends you money electronically through the U.S. Treasury. "SSA" is the Social Security Administration, "TREAS" is the U.S. Treasury (which actually moves the money), and "310" identifies the payment as a federal ACH direct deposit. In plain terms: it's your Social Security money arriving — not a bank error and not a mystery charge.
What the codes next to it mean
The word that follows the code tells you exactly which kind of federal payment you received:
| Code on your statement | What it is |
|---|---|
| SSA TREAS 310 · XXSOC SEC | Your regular monthly Social Security benefit — retirement, survivors, or disability (SSDI) |
| SSI TREAS 310 · XXSUPP SEC | Your monthly Supplemental Security Income (SSI) payment |
| SSA TREAS 310 · MISC PAY | A one-time payment from the SSA: back pay, an underpayment correction, or a reimbursement |
| IRS TREAS 310 · TAX REF | Not from the SSA — this is a federal tax refund from the IRS |
| VACP TREAS 310 · XXVA BENEF | Also not from the SSA — this is a VA (Veterans Affairs) benefit payment |
Why you might get an unexpected SSA TREAS 310 deposit
An extra or surprise deposit is usually good news, and there are three common explanations:
- SSDI back pay. Disability claims take months (sometimes years) to approve. When approval finally comes, the SSA pays everything it owed you since your entitlement date — often as one large MISC PAY deposit covering many months.
- Underpayment corrections. If the SSA reviews your earnings record and finds it paid you less than it should have, it deposits the difference retroactively.
- Two SSI payments in one month. When the 1st of next month falls on a weekend or holiday, next month's SSI arrives early — so your statement shows two deposits one month and none the next. You still receive exactly 12 payments a year. See the SSI payment schedule for the exact months this happens.
Watch out for the "wrong deposit" scam: fraudsters sometimes call or email claiming a deposit was sent to you by mistake and must be returned via gift cards, wire transfer, or a payment app. The SSA never does this. If you truly doubt a deposit, call the SSA yourself at 1-800-772-1213 before moving any money.
Why the amount can differ from what you expected
- Medicare Part B premium is deducted from most retirement and SSDI benefits before the money reaches your bank.
- Tax withholding, if you asked the SSA to withhold federal taxes.
- Overpayment recovery — if the SSA overpaid you in the past, it can withhold part of each check until the balance is repaid.
- The annual COLA — every January, benefits rise with the cost-of-living adjustment (2.8% for 2026), so the first deposit of the year is bigger than December's.
After the 2.8% COLA, the average retired worker receives $2,071 per month in 2026, and the maximum federal SSI payment is $994 for an individual. Your exact figure is in your my Social Security account.
When does the SSA TREAS 310 deposit arrive?
Social Security follows a fixed monthly calendar based on your situation:
- SSI → the 1st of the month
- Benefits started before May 1997 (or SS + SSI together) → the 3rd of the month
- Born on the 1st–10th → 2nd Wednesday
- Born on the 11th–20th → 3rd Wednesday
- Born on the 21st–31st → 4th Wednesday
Weekends and federal holidays push the deposit to the previous business day — see the full 2026 payment schedule with every adjusted date, or check what time the deposit hits your account on the day itself.
Frequently asked questions
What is an SSA TREAS 310 deposit?
SSA TREAS 310 is the code banks show for an electronic payment from the Social Security Administration, sent through the U.S. Treasury. It's how your retirement, survivors, or disability (SSDI) benefit appears on your bank statement. The companion code XXSOC SEC confirms it's a regular monthly Social Security benefit.
What does XXSOC SEC mean next to SSA TREAS 310?
XXSOC SEC identifies the payment as a regular monthly Social Security benefit — retirement, survivors, or SSDI. If you see XXSUPP SEC instead, the deposit is Supplemental Security Income (SSI). MISC PAY marks a one-time payment such as back pay or a reimbursement.
Why did I get an SSA TREAS 310 deposit I wasn't expecting?
The most common reasons are back pay after an SSDI approval (often covering several months), an underpayment correction after the SSA reviewed your record, or a retroactive adjustment. Check your my Social Security account at ssa.gov to see what the payment covers, or call 1-800-772-1213.
Is SSA TREAS 310 legitimate or a scam?
The code itself is legitimate — it's how the U.S. Treasury labels Social Security payments. Be careful with the follow-up scam, though: fraudsters sometimes claim a deposit was sent 'by mistake' and pressure you to return money via gift cards or wire transfer. The SSA never asks for that. If you doubt a deposit, contact the SSA directly before touching the money.
Why is my SSA TREAS 310 deposit smaller than expected?
Common reasons: your Medicare Part B premium is deducted before the deposit, federal taxes are withheld at your request, or the SSA is recovering a previous overpayment. After the 2.8% COLA, the 2026 average retired-worker benefit is $2,071 — but your exact amount depends on your record and deductions.
When does the SSA TREAS 310 deposit arrive each month?
It depends on your payment group: SSI on the 1st, beneficiaries who started before May 1997 on the 3rd, and everyone else on the 2nd, 3rd, or 4th Wednesday depending on their birthday. When a date falls on a weekend or federal holiday, the deposit arrives the previous business day.
Never wonder where your payment is again
Get a free email reminder before each Social Security payment date, so you know exactly when to expect your money.