Survivor Benefit Plan cost equals 6.5% of your elected base amount, deducted from your retired pay every month. That single number drives every dollar figure in this guide. Understanding the formula before you retire helps you pick a base amount that protects your family without shrinking your own paycheck more than you can afford.
The Survivor Benefit Plan (SBP) is run by the Defense Finance and Accounting Service (DFAS). If you want the full rules on eligibility, coverage percentages, and the SBP-DIC offset, read our companion guide: What Is SBP? The Survivor Benefit Plan, Explained. This page focuses on one question: how much will SBP actually cost you, in real dollars, every month?
The SBP Cost Formula, in Plain Terms
SBP premiums cost 6.5% of your elected base amount per month for spouse coverage. Your base amount is a dollar figure you choose at retirement — it can be as low as $300 or as high as your full gross monthly retired pay. The annuity your survivor collects is 55% of that same base amount, for life.
Two numbers matter, and they are locked together:
- Premium (what you pay): 6.5% × base amount, taken pre-tax from your retired pay each month.
- Annuity (what your spouse gets): 55% × base amount, paid monthly for the rest of their life, with annual cost-of-living adjustments.
Because both numbers scale off the same base amount, you can't raise the payout to your survivor without also raising your own premium. That tradeoff is the entire decision.
What "Base Amount" Actually Means
Base amount is the dollar figure you elect at retirement — not automatically your full retired pay. Most retirees elect the maximum, which is 100% of gross retired pay, because that maximizes the annuity. But the law lets you elect any amount from $300 up to your full retired pay.
Electing less than full coverage lowers both your monthly premium and your spouse's eventual annuity, in the same proportion. A retiree with $4,000 in monthly retired pay who elects a $2,500 base amount pays a smaller premium than full coverage, but their survivor also collects a smaller annuity. There is no way to get the full annuity at a discounted premium — the formula does not allow it.
People usually consider a reduced base amount when they are already carrying substantial life insurance, when a spouse has independent retirement income, or when a tight household budget makes the full premium unworkable in the near term. If you're weighing that tradeoff, run your numbers through our military retirement calculator first — it's built to estimate your gross retired pay, which is the starting number every SBP calculation depends on.
Worked Dollar Examples at Several Pay Levels
Here is what the formula produces at five common retired-pay levels, assuming the full base amount (100% of retired pay) is elected. These are original calculations built directly from the 6.5% premium / 55% annuity formula, not pulled from a third-party chart, so you can check the math yourself on any base amount.
| Base amount | Monthly premium (6.5%) | Monthly annuity to spouse (55%) |
|---|---|---|
| $2,000 | $130.00 | $1,100.00 |
| $3,000 | $195.00 | $1,650.00 |
| $4,000 | $260.00 | $2,200.00 |
| $5,000 | $325.00 | $2,750.00 |
| $6,000 | $390.00 | $3,300.00 |
To find your own number, multiply your intended base amount by 0.065 for the monthly premium, and by 0.55 for the monthly annuity your spouse would receive. The premium is deducted pre-tax, which lowers your taxable retired pay slightly compared to paying the same amount from take-home cash.
Full Coverage vs. a Reduced Base Amount
Choosing between full and reduced SBP coverage comes down to how much premium you can absorb versus how much annuity your family actually needs. The table below lays out the tradeoff at a glance.
| Factor | Full base amount (100% of retired pay) | Reduced base amount |
|---|---|---|
| Monthly premium | Highest possible | Lower, scales with base amount |
| Survivor annuity | Highest possible (55% of full pay) | Lower, same ratio |
| Best fit for | Families relying on retired pay as primary income | Retirees with sizable life insurance or a spouse's independent income |
| Spouse concurrence required if reduced? | N/A | Yes, in writing |
Verdict: most financial counselors default retirees toward full coverage because the annuity is inflation-protected for life, and the election is generally irrevocable — a downgrade later is far harder than accepting a smaller premium now.
Is There an SBP Calculator Tool?
No, this site does not currently run a dedicated interactive SBP premium calculator — this page is a formula guide, not a calculator tool. The math above (0.065 × base amount for premium, 0.55 × base amount for annuity) is simple enough to do with a phone calculator once you know your base amount. If you need your estimated gross retired pay first, start with our military retirement calculator, then apply the SBP formula to that number. A dedicated SBP calculator is on our roadmap as a possible future tool.
Reserve Component SBP Costs Differently
Reserve Component members electing SBP coverage that pays out before age 60 pay an added cost on top of the standard 6.5%, because the annuity could start decades earlier than a regular retiree's. If you're a Guard or Reserve retiree, confirm your exact RC-SBP premium with your service's retirement office rather than relying on the active-duty formula above.