If you wait until 70 to claim, Social Security benefits begin the month you turn 70, and the first deposit arrives the following month on the Wednesday tied to your date of birth. So the practical answer to what month Social Security benefits begin at age 70 is: the birthday month itself is your benefit start month, but the money shows up in the month after that.
The Month You Reach Age 70
Delayed retirement credits stop accruing the month you reach 70, which makes that month the right one to start.1eCFR. 20 CFR Part 404 Subpart D – Section: 404.313 Delayed Retirement Credits Waiting any longer earns you nothing extra.
There is a wrinkle in how the agency counts birthdays. Under federal regulations, you legally reach a given age on the day before your birthday.2Social Security Administration. Code of Federal Regulations 404.102 – Definitions For almost everyone this changes nothing. A July 15 birthday means you reach 70 on July 14, still in July. The exception is a birthday on the first of a month. If you were born August 1, you legally turn 70 on July 31, and July is your start month. Choose August and you forfeit a month of benefits.
When Your First Payment Arrives
Social Security pays one month behind. The benefit for a given month is deposited during the following calendar month.3Social Security Administration. What You Need to Know When You Get Retirement or Survivors Benefits If your benefits start in July, your first deposit lands in August.4Social Security Administration. Timing Your First Payment
Which day in August? That is set by a federal regulation that assigns everyone a Wednesday based on their birth date:5eCFR. 20 CFR 404.1807 – Monthly Payment Day
- Born on the 1st through the 10th: second Wednesday of the month.
- Born on the 11th through the 20th: third Wednesday.
- Born on the 21st through the 31st: fourth Wednesday.
Combining the one-month lag with the Wednesday schedule, the first deposit generally hits four to eight weeks after your benefit start month.
When to File and What Month to Enter
You can submit your application up to four months before the month you want benefits to begin.4Social Security Administration. Timing Your First Payment Someone turning 70 in August can file as early as April. Filing early does not start benefits early; it gives the agency time to process the claim so the first payment arrives on schedule.
The application asks you to pick a specific enrollment month. Enter the month you reach 70. That single field is what captures every delayed retirement credit you have earned. Getting it wrong is the most common way people accidentally shortchange themselves at this age, and the day-before-birthday rule is the reason a first-of-the-month birthday needs the prior month on the form.
You can apply online through a my Social Security account, by phone at 1-800-772-1213 (TTY 1-800-325-0778), or in person at a field office after scheduling an appointment.6Social Security Administration. How Do I Apply for Social Security Retirement Benefits Once processed, the agency mails a notice of award confirming your monthly amount and the date of your first payment.
If You Miss the Month You Turn 70
Applying after your 70th birthday does not mean the missed months are lost, but recovering them costs something. You can request up to six months of retroactive benefits paid as a lump sum.7Social Security Administration. Delayed Retirement Credits The catch: your official benefit start date shifts backward by the number of retroactive months you take, and you lose the delayed retirement credits for those months. That permanently lowers your ongoing monthly check.
Someone who applies six months after turning 70 and takes the full six months of back pay ends up with a benefit calculated as of age 69 and a half, not 70. The lump sum is real money, but the reduced monthly amount lasts for life and reduces the survivor benefit payable on your record. If you can do without the lump sum, declining retroactive benefits and starting from the month you apply preserves the full age-70 amount.
What Changes Automatically Once Payments Start
If you enrolled in Medicare at 65 while delaying Social Security, you have been paying the Part B premium through quarterly bills from the Centers for Medicare and Medicaid Services.8Social Security Administration. How Do I Make My Medicare Premium Payment if I Am Not Receiving Social Security Benefits Once your benefits begin, the premium is deducted directly from your monthly deposit. The standard Part B premium for 2026 is $202.90.9Centers for Medicare and Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles The switch happens on its own; nothing on your end is required.
The maximum monthly retirement benefit for someone starting at age 70 in 2026 is $5,181.10Social Security Administration. What Is the Maximum Social Security Retirement Benefit Payable Whatever your figure, the amount is locked in for life once your credits are applied, adjusted each year for cost-of-living increases.7Social Security Administration. Delayed Retirement Credits