Will Social Security Be Enough?How to Fill the Gap With Guaranteed Retirement Income

The average Social Security benefit pays about $2,071/month. Most retirees need $3,500–$5,500/month to maintain their lifestyle. That gap — often $1,500 to $3,000 per month — is the single biggest financial risk in retirement. This guide shows you exactly how to measure your gap and how a guaranteed annuity income stream can cover it for as long as you live.

8 min read Updated March 2026

Important Disclosures: All annuity guarantees are subject to the claims-paying ability of the issuing insurance company. Annuities are not FDIC-insured and are not bank products. This content is for informational purposes only and does not constitute financial, tax, or legal advice.

What Social Security Actually Pays (The Real Numbers)

Before planning around Social Security, you need to know what it actually pays — not what you hope it pays.

(SSA)

(SSA)

(SSA)

If you earned $80,000/year before retiring, you likely need $56,000–$68,000/year in retirement income. Social Security may cover $24,852 of that ($2,071/month × 12). The remaining $31,000–$43,000 per year has to come from somewhere else.

Our retirement income calculator estimates your Social Security benefit based on your current income and planned retirement age — so you can see your income gap without leaving this page. For your official earnings history and benefit projection, you can also visit ssa.gov/myaccount.

Why Social Security Was Never Designed to Replace Your Income

Social Security was created in 1935 as a supplement to retirement savings — not a replacement for your working income. The architects of the program explicitly designed it to cover basic needs alongside personal savings and pensions. But two things have changed dramatically since then:

The combination — no pension, longer life, and a Social Security benefit that covers less than half your pre-retirement income — creates a structural retirement income gap that most retirees face. The question is not whether the gap exists, but how large it is and how you plan to cover it.

How to Calculate Your Retirement Income Gap

This is a three-part calculation, and it takes less than five minutes if you have your Social Security estimate handy.

Estimate your monthly income need

Use the What Is Your Number? calculator for a personalized estimate based on your housing, healthcare, lifestyle, and spending habits. Or use the rule of thumb: multiply your current gross monthly income by 75–85%.

Look up your estimated Social Security benefit

Log in at ssa.gov/myaccount to see your personalized estimate at different claiming ages. Note that claiming at 62 permanently reduces your benefit by up to 30%; Delaying past full retirement age increases your benefit by 8% per year up to age 70.

Subtract to find your gap

Monthly income need minus Social Security (and any pension income) equals your retirement income gap. This is the number a guaranteed annuity income strategy is designed to fill.

Example Gap Calculation

Monthly income need (based on $75,000/yr earnings)

$4,500

Estimated Social Security benefit (age 67)

− $1,900

Pension income

− $0

Monthly retirement income gap

= $2,600/mo

The Floor Income Strategy: A 4-Step Framework

A floor income strategy means covering your essential monthly expenses — housing, food, healthcare, utilities — with guaranteed, non-market income sources. If your essential expenses are covered by income that cannot run out, you have financial security regardless of what markets do.

Here is the four-step framework for building your floor:

Calculate your total monthly income need

Separate your spending into essentials (must-pay every month) and discretionary (travel, dining, hobbies). Your floor only needs to cover essentials.

Subtract guaranteed income sources

Social Security and any pension income count toward your floor. Subtract both from your essential monthly need.

Identify your gap

The remaining amount is what your floor is missing. This is the amount that must come from non-market, guaranteed sources — not from portfolio withdrawals that depend on market performance.

Use a guaranteed income annuity to fill the gap

Select the annuity type that matches your timeline and gap size. Once the floor is covered, remaining savings can stay invested in growth assets for discretionary spending and inflation protection.

Multiple independent research organizations support the finding that retirees with guaranteed income sources report greater financial security and spend more confidently. A TIAA Institute study on retirement happiness found that guaranteed income is strongly associated with retiree wellbeing. A RAND Corporation working paper on retirement security and financial decision-making found that guaranteed income sources are linked to greater ability to meet essential expenses over time. And a National Bureau of Economic Research working paper by Jeffrey Brown found that life annuities provide meaningful welfare gains by insuring against the risk of outliving assets. The floor strategy is not a product — it's a structure backed by decades of research.

Which Annuity Type Fills Which Gap?

Not all annuities are designed for the same purpose. The right match depends on when you need the income and how large your gap is.


Gap Type: Need income now (retiring within 12 months) | Best Annuity Match: SPIA | Why It Works: Payments begin within 30 days of purchase; guaranteed for life regardless of how long you live

Gap Type: Need income in 5–15 years | Best Annuity Match: DIA | Why It Works: Lock in today's payout rates now; income starts at the date you choose — often significantly higher payouts than a SPIA purchased later

Gap Type: Want growth potential + future guaranteed income | Best Annuity Match: FIA with income rider | Why It Works: Tax-deferred accumulation linked to an index with downside protection; income rider provides guaranteed withdrawals for life regardless of account value

Gap Type: Need safe accumulation before converting to income | Best Annuity Match: MYGA | Why It Works: Guaranteed interest rate for 2–10 years; at maturity, funds can be converted to a SPIA or DIA at then-current rates


Each product links to a full guide with payout examples, suitability frameworks, and current rates. If you are unsure which fits your situation, a licensed advisor can model specific quotes for your gap size and timeline.

Real-World Examples: Three Retirees, Three Gaps

These are illustrative composites based on common retirement scenarios. Actual annuity income amounts depend on age, gender, premium, carrier, and prevailing interest rates.

Monthly income need

$3,800

Social Security

$1,650

Income gap

$2,150/mo

SPIA Solution

Combined monthly need

$6,500

Combined Social Security

$3,200

Income gap

$3,300/mo

DIA Solution

Estimated monthly need

$5,000

Estimated Social Security

$2,500

Income gap

$2,500/mo

FIA + Income Rider Solution

The examples above are illustrative only. Actual annuity income amounts vary by age, gender, premium amount, carrier, and market conditions at time of purchase. Annuity guarantees are subject to the claims-paying ability of the issuing insurance company. Consult a licensed advisor for personalized quotes.

What About Inflation?

This is the most common objection to fixed annuity income — and it deserves an honest answer.

Fixed annuity income payments do not automatically adjust for inflation. If you receive $2,000/month from a SPIA today, you will receive $2,000/month in 20 years. Inflation will reduce the purchasing power of that income over time.

However, the floor income strategy accounts for this in two ways:

For those who want explicit inflation protection, some FIAs with income riders offer optional cost-of-living adjustment provisions, typically at a higher initial withdrawal rate. A licensed advisor can model the trade-off between higher initial income and inflation-adjusted income for your specific situation.

Is a Floor Income Strategy Right for You?

Appropriate For:

Not Suitable For:

Frequently Asked Questions

Next Steps

The floor income strategy is most effective when it is personalized — the right product, the right premium, at the right time. Here is how to move forward:

  1. Calculate your number — Use the WIYN retirement income calculator to estimate your monthly need and gap size.
  2. Check your longevity estimate — Use the longevity calculator to understand how long your income plan needs to last.
  3. Compare today's rates — See current annuity rates from 60+ carriers to benchmark gap coverage costs.
  4. Talk to a licensed advisor — A Retirement Income Specialist near you can model specific annuity quotes, compare product options, and help you build a complete floor income plan at no cost to you.

SPIA Guide — Immediate Income Annuities

How single premium immediate annuities work, payout options, rate comparisons, and who they're right for.

DIA Guide — Deferred Income Annuities

How to lock in future income at today's rates — the strategy for retirement planners 5–15 years out.

What Is Your Number? Calculator

Free retirement income calculator — estimates your monthly need, Social Security gap, and floor coverage amount.

Average Social Security Benefit

State-by-state Social Security benefit data, claiming age comparisons, and benefit maximization strategies.

Ready to explore your options?

Connect with a licensed annuity advisor who can help you find the right solution.

Find an Advisor →

Frequently Asked Questions

Most retirees cannot. The average Social Security benefit replaces only about 40% of pre-retirement income. Financial planners typically recommend replacing 70–85% of your working income in retirement. For most people, that requires additional income sources such as savings, investments, or guaranteed annuity income.
Your benefit depends on your earnings history and the age at which you claim. Get an estimate at ssa.gov. Claiming at 62 permanently reduces your benefit by up to 30%; Delaying past full retirement age increases your benefit by 8% per year up to age 70.
A floor income strategy means covering your essential monthly expenses — housing, food, healthcare, utilities — with guaranteed, non-market income sources. Social Security forms the base of that floor. Annuities can extend and fill the floor by adding guaranteed income that does not depend on market performance.
It depends on when you need the income. If you need income immediately, a Single Premium Immediate Annuity (SPIA) begins payments within 30 days. If you are 5–15 years from retirement, a Deferred Income Annuity (DIA) lets you lock in a future income stream at today's payout rates. If you want growth potential plus future income, a Fixed Indexed Annuity (FIA) with an income rider may be appropriate.
Annuity income amounts vary significantly by age, gender, premium, carrier, and prevailing interest rates. As a general illustration, a premium of approximately $300,000–$400,000 might generate around $2,000/month for life via a SPIA for a 65-year-old at current market rates. Use our retirement income calculator to estimate your gap, then speak with a licensed advisor for accurate quotes.
Fixed annuity income payments do not automatically adjust for inflation — they stay level over time. However, Social Security includes annual cost-of-living adjustments (COLA), which helps offset inflation on your income floor. Some annuities offer optional inflation riders. Advisors often recommend keeping some assets in growth investments as an inflation hedge alongside guaranteed income.
Yes, life-only and joint-life payout options on SPIAs and DIAs guarantee income for as long as you (and your spouse, if applicable) live — regardless of how long that is. The guarantee is backed by the financial strength and claims-paying ability of the issuing insurance company, not the FDIC or the federal government.

Have Questions About This Topic?

Connect with a licensed annuity advisor who can provide personalized guidance.

By submitting, you agree to be contacted by a licensed advisor. No obligation.