Annuitization vs Bond Ladder at $500K-$1.5M: Income Math

The annuitization-versus-bond-ladder decision is the single largest income-structure choice in retirement planning for households with $500,000 to $1.5 million in tax-deferred and taxable accounts. Both strategies produce predictable cash flow. Both meet the technical definition of guaranteed income. They differ on five dimensions that matter for real-world retirement outcomes: longevity protection, liquidity, counterparty exposure, tax flexibility, and estate value. The answer is not which strategy is better in isolation; the answer is what fraction of your portfolio goes to each, given your specific income gap, health, and risk tolerance.

This guide compares lifetime income math across the $500K to $1.5M range. It quantifies SPIA payouts at three premium sizes, the equivalent bond ladder cash flow, the age at which annuitization breaks even, and the IRMAA and Roth conversion considerations that academic comparisons routinely skip. The conclusion: for most households in this range, partial annuitization (covering the essential-expense floor) plus a Treasury bond ladder (covering 10 to 15 years of discretionary spending) produces a better risk-adjusted outcome than either pure approach.

SPIA payouts at $500K, $1M, and $1.5M (May 2026 rates)

Single premium immediate annuity payouts in mid-2026 reflect 10-year Treasury yields of approximately 4.3 percent and insurance industry mortality assumptions updated under the 2017 CSO tables. Quotes vary by insurer; the figures below are averages across three A+ rated carriers (MassMutual, New York Life, Pacific Life) collected in early May 2026:

$500,000 premium, life-only payout

• Male age 67: $3,075/month ($36,900/year)
• Female age 67: $2,875/month ($34,500/year)
• Joint life 67/65, 100 percent to survivor: $2,650/month ($31,800/year)
• Joint life 67/65, 50 percent to survivor: $2,875/month ($34,500/year)

$1,000,000 premium, life-only payout

• Male age 67: $6,150/month ($73,800/year)
• Female age 67: $5,750/month ($69,000/year)
• Joint life 67/65, 100 percent to survivor: $5,300/month ($63,600/year)
• Joint life 67/65, 50 percent to survivor: $5,750/month ($69,000/year)

$1,500,000 premium, life-only payout

• Male age 67: $9,225/month ($110,700/year)
• Female age 67: $8,625/month ($103,500/year)
• Joint life 67/65, 100 percent to survivor: $7,950/month ($95,400/year)

The payout-to-premium ratio is approximately 7.4 percent for a 67-year-old male life-only contract. This is not interest yield; it is interest plus mortality credits (income shifted from annuitants who die early to those who live long) plus a return of principal. A SPIA payout of $73,800/year on $1M is materially higher than any bond yield because the insurer expects roughly half of 67-year-old male annuitants to die before age 85 and applies that mortality credit to current payouts.

Treasury bond ladder cash flow at $500K, $1M, and $1.5M

A 10-year Treasury bond ladder buys 10 equal slices of Treasuries maturing in years 1 through 10. As each rung matures, the retiree receives the $100,000 principal plus accumulated coupon interest. Building the ladder in May 2026 with the prevailing yield curve (1-year T-bill at 4.7 percent, 2-year at 4.5 percent, 5-year at 4.3 percent, 10-year at 4.3 percent):

$500,000 ladder, 10 rungs of $50K each

• Average annual cash flow: approximately $49,500 (principal plus interest as each rung matures)
• Total 10-year cash flow: approximately $495,000 to $510,000
• After year 10: $0 (ladder depleted)

$1,000,000 ladder, 10 rungs of $100K each

• Average annual cash flow: approximately $99,000
• Total 10-year cash flow: approximately $990,000 to $1,020,000
• After year 10: $0

$1,500,000 ladder, 10 rungs of $150K each

• Average annual cash flow: approximately $148,500
• Total 10-year cash flow: approximately $1,485,000 to $1,530,000
• After year 10: $0

The bond ladder produces materially higher annual cash flow than the SPIA, but only for 10 years. After the ladder ends, the SPIA continues forever; the ladder produces zero. The SPIA versus ladder comparison is therefore not a yield comparison but a lifetime-cash-flow comparison.

Break-even age: when does annuitization win?

For a 67-year-old male annuitizing $1M life-only at $73,800/year versus building a $1M Treasury ladder that pays $99,000/year for 10 years:

• Years 1-10: Ladder pays $25,200/year more ($99,000 vs $73,800). Cumulative ladder advantage: $252,000.
• Year 11+: SPIA continues at $73,800/year; ladder pays $0. Annual SPIA advantage: $73,800.
• Break-even (undiscounted): Year 14. By age 81, the SPIA has caught up to the ladder's 10-year head start.
• Break-even (discounted at 4 percent): Approximately year 17. By age 84, the SPIA wins on present-value basis.

However, the simple comparison ignores reinvestment of the ladder's excess cash flow. If the retiree invests the $25,200/year ladder advantage at 4 percent compound returns, by year 10 they have approximately $310,000 of reinvested surplus. This surplus generates approximately $13,500/year of bond interest forever (or can be spent down over years 11-30). Adjusting for the reinvestment:

• Break-even (with reinvestment): Year 20. By age 87, the SPIA finally wins.
• Female break-even (with reinvestment): Year 22. By age 89, the female SPIA wins.
• Joint-life break-even: Approximately year 24. By age 91 for the joint household.

These break-even ages are roughly consistent with the Society of Actuaries 2012 Individual Annuity Mortality Tables and the Pfau and Milevsky academic studies. Past age 87 for males, 89 for females, and 91 for joint households, the SPIA mortality credit advantage becomes large enough to overcome the ladder's flexibility advantage. Before those ages, the ladder generally produces equivalent or better total income with full liquidity preservation.

The liquidity calculation: what flexibility is worth

Annuitization is irreversible. Once the SPIA premium is paid, the retiree cannot access the underlying principal under any circumstance. If medical costs require $80,000 in year 4, the only source of funds is the monthly annuity payment, other portfolio assets, or selling the home. The SPIA is permanently inaccessible.

A Treasury bond ladder can be liquidated at any time. Individual Treasuries trade in one of the most liquid markets in the world; a $100,000 10-year Treasury can be sold within minutes of placing the order during market hours. The price received depends on interest rates at sale: if rates have risen since purchase, the bond sells below par; if rates have fallen, it sells above par. The typical secondary-market price is within 5 to 10 percent of par for short-duration Treasuries (less than 5 years to maturity).

The value of this liquidity depends on the retiree's other reserves. If they have a $200,000 home equity line of credit, a $100,000 emergency fund in a money market account, and $250,000 in a taxable brokerage account, the marginal liquidity from the bond ladder may be worth little. If the SPIA-funding premium represents 70 percent of total liquid assets, the liquidity loss is severe.

Practical guideline: do not annuitize more than 40 to 50 percent of your investable portfolio. If you have $1M and need $50K of annuity income, write a $700K premium check anyway. Keep the remaining $300K liquid for medical, family, or longevity surprises.

Tax flexibility: the bond ladder advantage in the Roth conversion window

Between retirement and the first RMD year (age 73 under SECURE 2.0), the retiree has a multi-year window where taxable income is low and Roth conversions can fill the 12 percent and 22 percent brackets cheaply. A $1M SPIA inside a traditional IRA delivers $73,800/year of fixed taxable income whether the retiree wants it or not. This consumes nearly all of the 22 percent bracket (approximately $103,350 single, $206,700 MFJ in 2026 from the top of the 22 percent bracket), leaving little room for Roth conversions.

A bond ladder inside the traditional IRA produces variable distributions. In a year when the retiree plans a $40,000 Roth conversion, they can choose to take a smaller IRA distribution (selling the maturing rung but reinvesting most of it in new Treasuries to push the distribution back to a future year). The bond ladder essentially gives the retiree a control lever over taxable income that the SPIA does not.

For a couple with a $1M traditional IRA and 7 pre-RMD years (ages 66 to 72), the bond ladder approach typically produces approximately $25,000 to $35,000/year of additional Roth conversion capacity versus the SPIA approach. Over 7 years, that is $175,000 to $245,000 of additional Roth conversion. At an arbitrage gap of 10 to 12 percentage points (current 22 percent bracket vs future 32 percent IRMAA-pushed bracket), the lifetime tax savings is approximately $17,500 to $30,000.

Worked example: $1M portfolio, 67-year-old couple, $60K income gap

Frank and Diane are both 67. Combined Social Security: $54,000/year. Essential expenses: $84,000. Income gap: $30,000/year. Total portfolio: $1M (Frank's traditional IRA $700K, Diane's Roth IRA $200K, joint taxable brokerage $100K). Both are in average health.

Strategy A: Full annuitization of $700K traditional IRA

• SPIA premium: $700,000 from Frank's traditional IRA, joint-life 100 percent to survivor
• Monthly payout: $3,710 ($44,500/year)
• Combined income: $54,000 SS + $44,500 annuity = $98,500
• Above the $84,000 essential expense floor. The Roth and taxable accounts ($300,000) cover discretionary spending and emergencies.
• Lifetime income locked. Estate value of the annuity: $0 (life-only).

Strategy B: Full bond ladder with $700K traditional IRA

• 10-year Treasury ladder: $700,000 in 10 rungs of $70K each
• Annual cash flow: approximately $69,300 (years 1-10)
• Combined income years 1-10: $54,000 SS + $69,300 ladder = $123,300/year. Surplus over essential expenses: $39,300/year.
• Years 11+: ladder depleted. Annual income: $54,000 SS + (whatever the $300,000 of Roth/taxable plus reinvested ladder surplus provides). If the surplus is reinvested and earns 4 percent, by year 11 the reinvested surplus is approximately $470,000, supporting roughly $19,000/year at a 4 percent withdrawal rate.
• Year 11+ income: $54,000 SS + $19,000 from invested surplus + drawdown of $300,000 = $73,000 plus drawdown. Tight for essential expenses; relies on disciplined reinvestment.

Strategy C: Partial annuitization (the blended approach)

• SPIA premium: $300,000 (joint-life 100 percent to survivor) = $1,590/month ($19,080/year)
• Bond ladder: $400,000 from Frank's traditional IRA = $39,600/year for 10 years
• Remaining: Roth $200K + Taxable $100K = $300,000 reserve
• Combined income years 1-10: $54,000 SS + $19,080 annuity + $39,600 ladder = $112,680. Surplus over essential expenses: $28,680/year, available for discretionary spending and reinvestment.
• Year 11+: SPIA continues at $19,080. Combined income: $54,000 + $19,080 = $73,080 from guaranteed sources, plus drawdown of remaining portfolio (Roth, taxable, plus 10 years of reinvested ladder surplus).
• Essential expense floor of $84,000 is covered by SS plus annuity through year 30+.
• Liquidity preserved: $300K Roth + $100K taxable + remaining ladder rungs.
• Estate value: bond ladder and Roth pass to heirs; only the $300K annuity is lost at second death.

Strategy C provides better risk-adjusted outcomes than either pure approach: longevity protection on the floor (annuity), liquidity and flexibility in the near term (ladder + reserves), and estate value preservation (Roth and remaining assets). The trade-off is complexity and the discipline to reinvest the surplus.

Decision framework: six questions to ask yourself

• What is your essential-expense income gap after Social Security and pension? If the gap is small ($15K-$25K), a modest SPIA at $200K-$350K premium closes it without sacrificing flexibility on the rest of the portfolio.
• How much liquid reserve do you have outside the SPIA premium? If you have less than 12 months of expenses in liquid reserves outside any planned annuity premium, the liquidity loss from annuitization is high. Build reserves first; annuitize second.
• What is your projected MAGI in pre-RMD years? If you have 5+ years between retirement and age 73 with low projected income, the bond ladder preserves Roth conversion capacity worth $20K-$30K in lifetime tax savings.
• What is your family longevity history? Parents in their 90s: lean toward annuitization. Family history of late-50s/60s deaths: lean toward bond ladder for the same reason annuities have mortality credits.
• How concerned are you about counterparty risk on the insurer? Treasuries are full-faith-and-credit federal obligations. State guaranty associations cover SPIA contracts up to $250K-$300K in most states. Splitting a $500K annuity across two insurers stays under guaranty limits.
• Do you have an estate plan that benefits from preserving capital? If you want to leave assets to heirs, the bond ladder and remaining portfolio preserve estate value; the SPIA does not.

Key takeaways

• SPIA payouts in May 2026 at 4.3 percent 10-year Treasury yields: $500K premium pays roughly $3,075/month (male 67, life-only), $1M pays roughly $6,150/month, $1.5M pays roughly $9,225/month. Joint-life and female contracts pay 10 to 25 percent less depending on rider structure.
• A 10-year Treasury bond ladder pays approximately 9.9 percent of the principal each year ($99K on $1M) but ends after 10 years. The SPIA continues forever.
• Break-even age (with reinvestment of ladder surplus): approximately 87 for a 67-year-old male, 89 for female, 91 for joint household. Past those ages annuitization wins on lifetime income; before them the bond ladder typically wins on flexibility.
• Partial annuitization (covering the essential-expense gap) plus a Treasury bond ladder (covering near-term discretionary spending) produces better risk-adjusted outcomes than either pure approach for most households in the $500K to $1.5M range.
• The bond ladder preserves Roth conversion capacity worth $20K-$30K in lifetime tax savings across a 5-7 year pre-RMD window. The SPIA inside a traditional IRA consumes bracket space involuntarily and eliminates Roth conversion flexibility.
• Counterparty risk: Treasuries are full-faith-and-credit federal obligations; SPIAs depend on insurer solvency with state guaranty backstops typically $250K-$300K. Split large annuity purchases across multiple A+ rated insurers to stay within guaranty limits.