Social Security Spousal Benefit Calculator

By Justin Pritchard, CFP®, MBA, RMA

Spousal benefits are one of the most important parts of Social Security retirement income. A spouse who did not work outside the home or who had lower earnings can get a bump up in income with this feature. The total amount may be up to one half of the higher earner’s Social Security benefit at full retirement age (FRA).

But the rules are complicated. As a result, people end up getting less than they expected (less than 50% of the higher earner’s income), and it’s an unwelcome surprise.

This calculator with spousal benefit calculations shows you how Social Security might work for your situation, including married and divorced couples. It accounts for claiming ages and how your benefit amounts might change.

See instructions and important tips below the calculator to learn more how your benefits really work.

How Spousal Benefits Are Calculated

Short explainer videos (60-90 seconds) on YouTube:

• How to Get 50% of a Spouse’s Social Security
• Higher Earner Must Claim to “Unlock” Spousal Benefits
• When You Get Less Than Half of a Spouse’s Benefit

Full 17-minute explainer on YouTube with examples and more visuals: Why You Don’t Get Half of Spouse’s Benefit.

A spousal benefit from Social Security can be up to half of the higher earner’s benefit at FRA. It’s critical to understand each detail:

• Up to half: It’s possible that the lower-earning (or non-working) spouse will get less than half, especially if they claim benefits early.
• Higher earner’s benefit at FRA: The 50% amount is based on what the higher earner would get at their FRA (often age 67). You might not get half of what the high earner is currently getting if they claim early or delay claiming.

There may be two parts to “spousal benefits”:

1. Own benefit: If the lower earner worked and paid into Social Security, they may have their own benefit.
2. Top-off: An additional amount, which we’ll call the top-off or spousal excess. This can potentially bring the lower earner’s total payment up to 50% of the higher earner’s FRA benefit.

If a spouse never worked outside of the home or never paid into Social Security, the entire spousal benefit comes from the spousal excess.

Shortcut: For the lower earner or non-working spouse to get half of the high earner’s benefit at FRA, two things must be true:

1. The low earner must start taking all of their benefits at FRA or later.
2. The high earner must be taking benefits, which “unlocks” the spousal benefit.

We’ll break all of that down below.

Important: If the lower earner’s benefit at FRA is 50% or more of the higher earner’s income, the lower earner would just get their own benefit with no spousal benefit.

Want help with all of this? See the Pricing page to view your options.

Calculation Details and Methodology

When both spouses are at their FRA or above, here’s how you calculate the Spousal Benefit:

1. Find the high earner’s primary insurance amount (PIA). That’s their Social Security retirement benefit if they claim at their FRA, which is often age 67.
2. Divide by two, to arrive at half of the PIA above.
3. If the lower-earning spouse has a benefit of their own, subtract that from half of the PIA in the previous step. This is the spousal excess or top-off.
4. Add the lower earner’s PIA to arrive at the monthly payment the lower earner (or non-working spouse) would receive.

Important: Always use the PIA, which is the benefit amount if each spouse claims at their FRA. If somebody claimed early, they’ll have reduced benefits, and if they delay claiming after FRA, they’ll have an increased benefit. Do not use the reduced or increased monthly amount.

Example: Assume Pat and Kelly are married and are the same age. Pat is the high earner with a PIA of $3,000. Kelly’s PIA is $1,200. Pat will claim benefits when both of them are at FRA (age 67). How does Kelly’s benefit look at different claiming ages?

Unlocking Spousal Benefits

A spousal benefit can only be paid when the higher earning spouse is taking benefits. In other words, if the lower-earning spouse claims based on their own work record, they’ll only get their own benefit unless the high earner is also taking benefits.

If the high earner has not yet claimed, the low earner’s spousal excess (or top-off) will begin later, once the higher earner “unlocks” it by claiming. That unlock date determines how much the lower earner will receive as a spousal excess because any reductions are based on the age at which the spousal excess begins.

In our example above, Kelly claimed early, getting a permanently reduced base benefit. But if Pat claims when they’re both age 67, Kelly will get a full spousal top-off because that event happens at or after Kelly’s FRA. But if Kelly becomes entitled to the top-off before FRA (because both of them claim early), the top-off will be reduced.

Reductions to Spousal Benefits

There are several potential scenarios depending on the claiming ages involved:

1. The base benefit might be reduced
2. The spousal top-off might be reduced
3. Both might be reduced
4. Neither might be reduced

According to SSA: “A spousal benefit is reduced 25/36 of one percent for each month before normal retirement age, up to 36 months. If the number of months exceeds 36, then the benefit is further reduced 5/12 of one percent per month.”

It’s critical to understand whether or not you face a reduction. It doesn’t necessarily mean you should change your strategy, but you generally want a good reason for taking reductions. For example, a diagnosis with a short life expectancy might point toward early claiming making sense.

What About Inflation?

The calculator shows everything in today’s dollars. The assumption is that benefits should increase more or less with inflation. The increases almost certainly won’t match perfectly, but there’s no way to predict the future perfectly.

What to Consider

Your timing decision should incorporate multiple factors. Some examples of things to think about include:

• Total lifetime benefits
• Longevity
• Survivor benefits
• Tax consequences (calculate how much of your Social Security benefit will be taxed)
• Earnings from work before FRA
• Child in care benefits might change the strategy substantially
• Quality of life
• Portfolio withdrawals
• And more

FAQs