How to Build a Retirement Income Plan From Scratch at 45

Most people in their 40s have a vague awareness that they should be planning for retirement but no actual plan. They have accounts, a 401(k) from the current job, maybe an old IRA, a savings account, but no coherent strategy that connects those pieces to a specific retirement income number.

Building that plan from scratch at 45 is not difficult, but it does require working through several layers in sequence. This guide walks you through each one: what you need, what you have, what you will build, and how to structure income that lasts through a 25 to 30 year retirement.

Layer 1: Define Your Retirement Income Target

Before anything else, you need a number. Not a vague sense that you want to "be comfortable," an actual monthly or annual income target.

Start with your current spending. Pull your last 12 months of bank and credit card statements and add up total spending. This is your baseline.

Retirement spending typically runs 70 to 90% of pre-retirement spending, because:

• No payroll taxes (saves 7.65% immediately)
• No retirement contributions
• Often lower transportation costs
• Children are typically grown and out of the house
• Mortgage may be paid off

However, these savings are often partly offset by higher healthcare costs and increased leisure spending in early retirement.

A practical starting point: use 80% of your current annual spending as your retirement income target.

If you currently spend $72,000/year: target $57,600/year in retirement.

Now apply the 4% rule to find your portfolio target: $57,600 / 0.04 = $1,440,000.

This is your primary number. Everything else is about whether you can reach it, when you can reach it, and how you structure withdrawals once you do.

Layer 2: Map Your Existing Assets

Take a clean inventory of every financial asset you have. Be exhaustive:

For each account, calculate its projected value at your target retirement age using a compound growth calculator. A $120,000 401(k) at age 45 grows to approximately $560,000 by age 65 at 8% annual return, with zero additional contributions.

This exercise often surprises people. The existing assets, left alone, grow more than most people expect.

For the cash and savings row, note that high-yield savings accounts were still offering up to 4.50% APY as of July 2026, compared to the FDIC national average of 0.38%. A $20,000 balance earning 4.50% generates $900/year in interest versus $76 at a traditional bank. Every dollar in your savings should be working.

Layer 3: Estimate Your Social Security Benefit

Social Security will likely be a significant component of your retirement income. Knowing your estimated benefit now lets you plan the rest of the picture around it.

How to find your estimate: Create an account at SSA.gov My Social Security and view your Social Security statement. It shows your estimated monthly benefit at ages 62, 67, and 70 based on your earnings history.

The difference between claiming ages is substantial. As of December 2025 data published by the SSA, the average monthly benefit for retired workers is:

The overall average across all retired workers was $2,081 per month as of April 2026. The 2026 cost-of-living adjustment (COLA) was 2.5%.

Example: If your full retirement age benefit is $2,200/month:

• At 62: $1,540/month ($18,480/year)
• At 67: $2,200/month ($26,400/year)
• At 70: $2,728/month ($32,736/year)

The difference between claiming at 62 versus 70 is $14,256/year, for life. If you live to 85, delaying from 62 to 70 adds approximately $145,000 in lifetime income.

For your income plan at 45, conservatively assume your full retirement age benefit (67) as your baseline. Factor in a potential 20 to 25% benefit reduction as a downside scenario, given long-term Social Security funding discussions (though benefit cuts are politically difficult and far from certain).

Layer 4: Calculate Your Funding Gap

Now you can assemble the picture:

Retirement income target: $57,600/year

Minus projected Social Security at 67: $26,400/year

Minus any pension or other guaranteed income: $0 (or your actual figure)

= Portfolio-funded income needed: $31,200/year

Portfolio required to fund $31,200/year at 4%: $31,200 / 0.04 = $780,000

Now compare to your projected portfolio at 65. If your existing assets grow to $560,000 with no new contributions, you need to build an additional $220,000 through contributions over the next 20 years.

$220,000 in additional contributions over 20 years, at 8% average return, requires approximately $4,800/year ($400/month) in new contributions beyond what you currently put in.

This gap analysis often reveals that the situation is more manageable than feared. The combination of compound growth on existing assets and relatively modest additional contributions can close a gap that felt overwhelming.

Layer 5: Build the Income Stream Architecture

A retirement income plan is not just a portfolio number. It is a structured set of income sources that activate in sequence and sustain spending across a 25 to 30 year period.

The Three-Bucket System

A widely used framework organizes retirement assets into three time-based buckets:

Bucket 1: Cash and Short-Term (Years 1 to 3)

• 2 to 3 years of living expenses in high-yield savings or short-term CDs
• Purpose: Cover spending without selling investments during market downturns
• Typical size at retirement: $115,000 to $175,000

Bucket 2: Income (Years 4 to 10)

• Intermediate bonds, dividend stocks, bond funds, I-bonds
• Purpose: Generate income and refill Bucket 1 periodically
• Less volatile than pure equities, more return than cash
• Typical size: 3 to 5 years of expenses

Bucket 3: Growth (Years 10+)

• Stocks, equity index funds, long-term investments
• Purpose: Long-term real growth to fund later retirement decades
• Can withstand volatility because you will not touch it for 10+ years
• Typical size: Remainder of portfolio

As Bucket 1 depletes, you refill it from Bucket 2. Periodically, gains from Bucket 3 refill Bucket 2. This structure prevents the sequence-of-returns risk that derails many retirements.

Roth Conversion Strategy: The Bridge Years

For many 45-year-olds, the years between retirement (say, age 62) and Social Security claiming (age 67 to 70) represent a low-income window ideal for Roth conversions.

During those pre-Social Security years, your taxable income may be relatively low, just portfolio withdrawals. You can convert traditional IRA or 401(k) balances to Roth at a lower tax rate than you are currently paying, permanently reducing future RMDs and building tax-free income.

Planning for Roth conversions from 45 onward means structuring your contributions to position for this opportunity:

• Build a substantial traditional 401(k) that benefits from current deductions at your peak earnings bracket. The 2026 contribution limit is $23,500, with an additional $7,500 catch-up for those 50 and older.
• Maintain a Roth IRA for tax-free flexibility. The 2026 contribution limit is $7,000, with a $1,000 catch-up for those 50 and older.
• Leave the conversion strategy for the low-income bridge years before Social Security

Layer 6: Build Healthcare Into the Plan

Healthcare is the most commonly underestimated retirement expense. Fidelity's 2026 Retiree Health Care Cost Estimate puts average lifetime healthcare costs at $185,500 for a single 65-year-old and $371,000 for a couple, up 7.5% from 2025. This estimate assumes enrollment in traditional Medicare (Parts A, B, and D) and does not include long-term care, over-the-counter medications, or most dental services.

If you plan to retire before 65:

• Bridge coverage from 60 to 65 on the ACA marketplace is a major expense. In 2026, a 60-year-old pays an average of $822 per month for a benchmark Silver plan before subsidies, according to InsuranceCostGuide. For a couple both aged 60, that is roughly $19,700 per year before subsidies. However, premium tax credits are still available based on income, and retirees with lower taxable income may pay significantly less.
• Factor this into your annual spending target for the pre-Medicare years

If you have access to an HSA, maximize it every year from now through retirement. The 2026 HSA contribution limits are $4,400 for self-only coverage and $8,750 for family coverage, with a $1,000 catch-up contribution for those 55 and older. A fully-stocked HSA at retirement is one of the most powerful tools available for covering healthcare costs tax-free.

Once you reach 65 and enroll in Medicare, budget for ongoing premiums. The standard Medicare Part B premium in 2026 is $185.00 per month. If your modified adjusted gross income from two years prior exceeds $106,000 (single) or $212,000 (married filing jointly), IRMAA surcharges add $74.00 to $628.90 per month on top of the standard premium. Planning your retirement income to stay below IRMAA thresholds can save thousands per year.

Real-World Examples

Example: Janet, 45, operations manager, $91,000 salary, $185,000 in retirement accounts

Situation: Janet had never done a formal retirement income plan. She knew she wanted to retire at 65 but had no idea if she was on track.

What she did: She worked through all six layers. Current spending: $68,000/year. Target retirement income: $54,400/year. Projected Social Security at 67: $22,800/year. Portfolio-funded need: $31,600/year, requiring $790,000. Her existing $185,000 grows to $862,000 by 65 with no new contributions. She was already ahead of her minimum target, and by maximizing her 401(k) contributions at the 2026 limit of $23,500, she is now on track for $1.4M.

Result: The plan revealed she was in better shape than she thought, but also showed a healthcare gap she had been ignoring. Fidelity's 2026 estimate of $371,000 for a couple was $41,000 higher than the prior year. She opened an HSA, contributing the family maximum of $8,750, and started investing it in index funds.

Example: Michael, 47, high school teacher, $58,000 salary, $74,000 in a 403(b), state pension vested

Situation: Michael had a state pension that would pay $1,850/month at age 62, plus Social Security of an estimated $1,400/month at 67. He was unsure how much additional saving he needed.

What he did: Pension ($22,200/year) + Social Security ($16,800/year) = $39,000/year in guaranteed income. His spending target was $52,000/year. He needed only $13,000/year from portfolio, requiring just $325,000. His $74,000 already grows to $345,000 by 65 with no new contributions.

Result: Michael realized he is already close to his retirement goal primarily through his pension. He is now focused on building additional discretionary retirement savings and an HSA rather than panicking about a large portfolio number.

The Most Important Step: Write It Down

A retirement income plan that lives only in your head is not a plan. Write out:

1. Target retirement age
2. Annual spending target
3. Social Security estimate and planned claiming age
4. Other guaranteed income sources
5. Current account balances and projected values
6. Annual contribution target and account destinations
7. Healthcare bridge plan (ACA costs pre-65, Medicare premiums and IRMAA post-65, HSA balance)
8. Withdrawal sequencing strategy (which accounts to draw from first)

Review and update this document annually. Adjust as income changes, markets move, and life circumstances shift. The plan is a living document, not a fixed blueprint, but it has to exist on paper before it can guide decisions.

This post is for informational purposes only and does not constitute financial advice. Social Security estimates are based on current law and may change. Consult a financial planner for a personalized retirement income plan.