The one-month delay
Social Security benefits are paid in the month after the month they accrue. If your benefits start in May, your first check arrives in June. This applies to retirement, SSDI, and survivors benefits.
Which Wednesday
Your first deposit lands on the Wednesday that matches your date of birth: 2nd Wednesday for birthdays 1-10, 3rd Wednesday for 11-20, 4th Wednesday for 21-31. So if your benefits start in May and your birthday is June 15, your first June payment arrives Wednesday, June 17, 2026 (the 3rd Wednesday).
The 90-day rule for retroactive payments
If you were eligible for benefits before you applied, SSA can pay you up to 6 months of retroactive benefits in a single lump-sum, in addition to your regular monthly payments. The lump-sum deposits separately, usually 30-60 days after your claim is approved.
SSI first payment
SSI claims approved before the 1st of the month start paying that month, on the 1st (or earlier if the 1st is a weekend/holiday). If approved after the 1st, the next month's 1st is your first deposit. No retroactive lump-sum applies to SSI in most cases.
What to expect for the next 3 months
Many first-time beneficiaries find their net deposit varies for the first three months as SSA finalizes Medicare premium deductions, tax withholding, and any overpayment recovery. By month 4, the amount should stabilize.