Retirement Planning: Social Security to Roth

Why Retirement Planning Cannot Wait

The math of retirement is unforgiving: you need enough money to replace your income for 20-30 years without working. Social Security replaces only about 40% of the average worker’s pre-retirement income, meaning you need to fund the remaining 60% yourself.

The single most important factor in retirement planning is time. Thanks to compound growth, money invested early has decades to multiply. A 25-year-old who invests $500/month will have roughly $1.13 million at 65 (assuming 10% average annual return). A 35-year-old investing the same amount will have approximately $395,000. Starting 10 years earlier nearly triples the result.

If retirement feels distant and abstract, make it concrete: calculate a specific dollar number you need, determine how much you must save each month, and automate the contributions. This lesson gives you the tools to do exactly that.

Social Security: The Foundation (Not the Whole House)

Social Security provides a monthly retirement benefit based on your 35 highest-earning years. You fund it through FICA payroll taxes — 6.2% of your wages (matched by your employer) up to the Social Security wage base ($168,600 in 2025).

When to Claim

Age 62: Earliest eligibility. You can claim as early as 62, but your benefit is permanently reduced by approximately 30% compared to waiting until full retirement age.

Age 67: Full Retirement Age (FRA). For anyone born in 1960 or later, this is when you receive 100% of your calculated benefit.

Age 70: Maximum benefit. For each year you delay past FRA, your benefit increases by 8%. At age 70, your benefit is approximately 124% of your FRA benefit. There is no additional benefit for delaying past 70.

Real Numbers

The average Social Security retirement benefit in 2025 is approximately $1,900/month ($22,800/year). The maximum benefit at FRA is approximately $3,800/month. Even at the maximum, Social Security alone cannot fund a comfortable retirement for most Americans.

Social Security Planning Tips

• Check your estimated benefit at ssa.gov/myaccount — create an account and review your earnings record for accuracy
• Plan for reduced benefits. The Social Security trust fund is projected to be exhausted around 2033, after which benefits may be reduced by approximately 20% unless Congress acts. Building private savings assumes this worst case.
• Coordinate with a spouse. Spousal benefits, survivor benefits, and claiming strategies for couples can significantly increase total lifetime benefits. The higher earner generally benefits most from delaying to 70.
• Social Security is taxable. Depending on your total income, up to 85% of your Social Security benefit may be subject to federal income tax.

How Much Do You Need to Retire?

The 25x Rule

A simple guideline: you need approximately 25 times your annual retirement spending saved to retire safely. This is derived from the 4% rule — if you can withdraw 4% of your portfolio per year, you need 25x your annual withdrawal amount.

Example: If you want $60,000/year in retirement (equivalent to $5,000/month):

• Social Security provides: $24,000/year
• You need from savings: $36,000/year
• Total savings needed: $36,000 x 25 = $900,000

If you want $80,000/year:

• Social Security provides: $24,000/year
• You need from savings: $56,000/year
• Total savings needed: $56,000 x 25 = $1,400,000

The 4% Rule in Detail

The 4% rule comes from the “Trinity Study,” which analyzed historical market returns and found that a portfolio of 50% stocks and 50% bonds survived 30 years of withdrawals 95% of the time when the initial withdrawal rate was 4%, adjusted for inflation each year.

How it works in practice:

• Year 1: Withdraw 4% of your portfolio. On $1,000,000, that is $40,000.
• Year 2: Adjust for inflation. If inflation is 3%, withdraw $41,200.
• Year 3: $41,200 x 1.03 = $42,436. And so on.

Important caveats:

• The 4% rule assumes a 30-year retirement. If you retire at 40, you may need a lower withdrawal rate (3-3.5%).
• It assumes you maintain a diversified portfolio throughout retirement, not all cash.
• It is a guideline, not a guarantee. Flexibility — reducing spending slightly during market downturns — dramatically improves success rates.
• Some financial planners now suggest 3.5% as more conservative given lower expected future returns.

Building Your Retirement Portfolio

Target-Date Funds: The Simplest Approach

A target-date fund is a single fund that automatically adjusts its investment mix based on your expected retirement year. A “Target Retirement 2060” fund holds mostly stocks today and gradually shifts toward more bonds as 2060 approaches.

Advantages:

• One fund does everything — automatic diversification and rebalancing
• No decisions required beyond choosing the right target year
• Available in most 401(k) plans
• Low fees at major providers (Vanguard, Fidelity, Schwab)

How to choose: Pick the fund closest to the year you turn 65. If you were born in 1995, choose the 2060 fund. If you plan to retire early at 55, you might choose the 2050 fund.

The DIY Approach

If you prefer more control, build a simple portfolio using the three-fund approach:

Rebalance once per year by selling what has grown beyond its target percentage and buying what has fallen below. This systematically sells high and buys low.

Retirement Milestones by Age

In Your 20s

• Start contributing to your 401(k) at least up to the employer match
• Open a Roth IRA and contribute as much as possible
• Focus on building the habit of saving 15%+ of income
• Time is your greatest asset — even small amounts compound enormously

In Your 30s

• Aim to have 1x your annual salary saved for retirement by age 30
• Maximize 401(k) and Roth IRA contributions if possible
• Consider HSA contributions if eligible
• Review and optimize your investment allocation
• Avoid raiding retirement accounts for short-term needs

In Your 40s

• Target 3x your salary saved by age 40
• Make up for lost time with aggressive contributions if behind
• Begin modeling retirement scenarios with specific numbers
• Review Social Security estimates at ssa.gov
• Consider long-term care insurance options

In Your 50s

• Target 6x your salary saved by age 50
• Take advantage of catch-up contributions ($7,500 extra in 401(k), $1,000 extra in IRA)
• Create a detailed retirement budget — what will your actual expenses be?
• Develop a Social Security claiming strategy
• Begin planning for healthcare coverage between retirement and Medicare (age 65)

In Your 60s

• Target 8-10x your salary saved by age 60
• Determine your precise withdrawal strategy (which accounts to draw from first)
• Decide when to claim Social Security
• Enroll in Medicare at age 65 (regardless of retirement status)
• Consider converting Traditional IRA funds to Roth in low-income years before RMDs begin

Required Minimum Distributions (RMDs)

Starting at age 73 (under current law), you must begin taking minimum withdrawals from Traditional 401(k) and Traditional IRA accounts each year. The amount is calculated based on your account balance and IRS life expectancy tables.

Why RMDs matter: If you have a large Traditional 401(k) or IRA, RMDs can push you into a higher tax bracket and increase your Medicare premiums. Strategies to manage this:

• Roth conversions in low-income years (between retirement and age 73) — convert Traditional funds to Roth, pay taxes now at a lower rate, and avoid future RMDs
• Roth 401(k) and Roth IRA have no RMDs — another advantage of Roth accounts
• Donate RMDs to charity via Qualified Charitable Distributions (QCDs) if you are charitably inclined — this satisfies the RMD without increasing your taxable income

The Gap Between Retirement and Medicare

If you retire before 65, you need health insurance for the gap years. Options:

• COBRA — continue employer coverage for up to 18 months (expensive: you pay the full premium)
• ACA Marketplace — subsidized plans based on income (which is often low in early retirement, qualifying you for significant subsidies)
• Spouse’s employer plan — if your spouse is still working
• Short-term health insurance — limited coverage, not ACA-compliant, but cheaper

This gap is one of the most challenging financial planning issues for early retirees. Budget $500-$1,500/month per person for health insurance during this period, or factor ACA subsidies into your income planning.

Retirement Planning Tools

Social Security estimator: ssa.gov/myaccount

Retirement calculators: Fidelity’s Retirement Score, Vanguard’s Retirement Nest Egg Calculator, and the FIRE (Financial Independence Retire Early) calculator at firecalc.com all let you model different scenarios.

Professional help: A fee-only financial planner (paid by the hour, not by commissions) can create a comprehensive retirement plan for $1,000-$3,000. Look for the CFP (Certified Financial Planner) designation and verify at cfp.net.

Key Takeaways

• Social Security replaces approximately 40% of pre-retirement income — you must fund the remaining 60% yourself.
• Use the 25x rule: multiply your needed annual retirement income (minus Social Security) by 25 to get your savings target.
• The 4% rule provides a sustainable withdrawal framework for a 30-year retirement.
• Target-date funds offer the simplest path to a properly allocated retirement portfolio.
• Starting early is the most powerful retirement planning strategy — 10 extra years of saving can triple your final portfolio.
• Plan for the healthcare gap between retirement and Medicare at age 65.
• Roth accounts (IRA and 401(k)) provide tax-free income in retirement and avoid RMDs — maximize them, especially when young.
• Check your Social Security estimate at ssa.gov and review it annually for accuracy.

In the next lesson, you will learn how the US tax system works — W-2s, 1099s, tax brackets, deductions, credits, and strategies to keep more of what you earn.