Dear Liz: You recently wrote an interesting piece regarding the “file and suspend” strategy for Social Security benefits. I liked the possibility of getting a lump sum if I should need the money downstream.

But when I checked with Social Security, I was told that the lump sum maximum was six months of suspended payments. Am I missing something? My understanding was that I could collect all the suspended payments if need be. Is there a specific code I could reference to our Social Security office to clear this matter up?

Answer: You’re not missing something. The Social Security representative you talked to is confusing retroactive benefits with the reinstatement of benefits that were voluntarily suspended.

When you file for benefits after your full retirement age (currently 66), the maximum lump sum you can get is six months’ of missed benefits.

When you “file and suspend” your application at or after full retirement age, however, you can end the suspension at any time and get a lump sum for all the benefits you missed.

Unfortunately, the misinformation you received isn’t unusual.

Financial planners around the country have reported running into Social Security reps who insist that only six months’ of benefits are available to people who file and suspend, which isn’t true.

The procedure is outlined in the Social Security Administration’s “Program Operations Manual System” under GN 02409.130 Voluntary Suspension Reinstatement

It’s also described in plain English on Social Security’s site: “If you change your mind and want the payments to start before age 70, just tell us when you want your benefits reinstated (orally or in writing). Your request may include benefits for any months when your payments were suspended.”

The ability to file and suspend, then change your mind, is an important protection for those who understand the important role Social Security plays as longevity insurance.

The smartest course is often to let your benefit grow to its maximum amount, taking advantage of the “delayed retirement credits” that increase your benefit 8% annually between your full retirement age (currently 66) and age 70.

If you should later find yourself in need of the money, you can get a lump sum payout for the missed benefits back to the day you filed and suspended, if you want.

But opting for the lump payment means you lose your delayed retirement credits for that period. In other words, if you ask for a lump sum dating back to your initial filing, your monthly benefit is reset to the smaller amount you would have gotten then.

Dear Liz: I was told by a staff person at our Social Security office that because I am seven years older than my husband (he is 58, I am 65), the “file and suspend” wouldn’t work for me and that because I am waiting until 70 to claim benefits, it was a non-issue.

Is that correct? How does the “lump sum” option figure into the equation? How quickly would I have to file and suspend not to be penalized for the process?

Answer: The “file and suspend” option allows you to file for your Social Security benefit and then immediately suspend that application.

The suspension means your benefit continues to earn delayed retirement credits that boost the amount of your checks 8% each year until age 70, when your benefit reaches its maximum. The file and suspend option is available only once you’ve reached your full retirement age (which is currently 66 but which is rising to 67 for those born in 1960 or later).

There are two main reasons to file and suspend. The first is to allow your spouse to claim spousal benefits based on your work record. The second is to give you the option to change your mind.

If you file and suspend, then discover you need the money, you can either start benefits at the larger amount you’ve earned with delayed retirement credits, or give up those credits and instead receive a lump sum payment of benefits back to the date you suspended your application.

There’s no reason for you to file and suspend for spousal benefits since your husband would have to be 62 before he could file for those checks. By that time, as the Social Security representative points out, you’ll be close to age 70, when you plan to start your benefit anyway.

You could still file and suspend as an insurance strategy — in case you need the money later. If that’s your plan, then doing so at your full retirement age of 66 would give you the option of requesting the largest possible lump sum if you do change your mind.

Decisions about when to start Social Security benefits and how to coordinate benefits when you’re married (or divorced, or widowed) can be extremely complex.

Please read the information the AARP provides on its site about maximizing Social Security benefits and consider using one of the available calculators to explore your options. AARP and T. Rowe Price have free calculators, and you can find more sophisticated options for $40 at sites including MaximizeMySocialSecurity.com and SocialSecurityChoices.com.

Dear Liz: You’ve been writing about the “file and suspend” option that allows you to delay taking Social Security while still reserving the ability to get a lump sum if you later change your mind.

If I file and suspend but choose not to take a lump sum before my benefit maxes out at 70, what happens to those funds? What happens to those funds if I die before 70?

Answer: Remember that Social Security is a pay-as-you-go program. The Social Security taxes you pay aren’t piled up in some kind of account, waiting for you to retire. Your taxes pay current retirees’ benefits, just as future workers’ taxes will pay yours.

When you delay starting Social Security, you’re rewarded with a potentially larger check each year you put off claiming until age 70. Your benefit grows by about 7% each year between age 62 and your full retirement age, which is currently 66.

Between full retirement age and 70, your benefit grows at 8% each year in what’s called “delayed retirement credits.”

If you file and suspend at your full retirement age, then change your mind, you can get a lump sum equal to all those checks you passed up since you filed. However, you lose the 8% delayed retirement credits you could have otherwise claimed.

Your benefit is reset to the lower amount you would have received at full retirement age, and that’s the benefit on which all future cost-of-living calculations would be made.

Should you die after filing and suspending, your surviving spouse would be able to benefit from those delayed retirement credits. His survivor’s benefit would be equal to what you could have claimed as of the date of your death.

Dear Liz: You recently encouraged a reader to listen to his financial advisor, who wanted him to file for his Social Security benefit at his full retirement age of 66 but then suspend the application until his benefit maxes out at age 70.

Another good feature of this “file and suspend” maneuver is the ability to ask for all the unpaid benefits in a single lump sum in the event one develops a terminal illness or needs funds for some other exigent circumstance, such as long-term care. The potential lump sum “back pay” can be a pretty good insurance policy while waiting for age 70.

Answer: Thanks for highlighting this important feature. Many people who are on the fence about delaying Social Security don’t understand that their decision is reversible — as long as they wait until their full retirement age to file.

At that point, they have the option to file and suspend. If they later change their minds, they can request a lump sum for all the benefits back to the date they filed.

They lose any “delayed retirement credits” from waiting — in other words, their benefit is reset to what it would have been had it started at full retirement age — but they get a big chunk of cash when they may need it most.

People who file before their full retirement age, which is currently 66 and rising to 67 for people born in 1960 and later, don’t have the option to file and suspend.