Retirement PlanningLast updated: 2026-06-27Author: Hans Goldstein, NPN 20602398

The 4% Rule vs Annuity Replacement — When the Annuity Actually Wins

TL;DR: William Bengen's 4% rule says a 60/40 portfolio supports a 4% inflation-adjusted withdrawal for 30 years with ~95% confidence. SPIA payout rates today (6-9% depending on age) beat the 4% rule on cash flow at every age over 65 — but lose on legacy. The crossover where SPIA dominates is roughly age 70+ for single life and age 75+ for joint. Below: payout tables, IRR breakeven by life expectancy, and the MYGA hybrid that compromises.

What Bengen actually said

William Bengen's 1994 paper studied historical 30-year retirement periods using a 60% stocks / 40% bonds portfolio. He found that a 4.0% initial withdrawal rate, increased annually for inflation, survived every 30-year window from 1926 forward. Subsequent academic work updated the number to a range of 3.3% (Morningstar 2023) to 4.7% (Bengen 2022) depending on assumptions about returns, fees, and inflation.

The key features of the rule:

Built around 30-year horizon — a 65-year-old planning to age 95
Assumes 60/40 portfolio with annual rebalancing
Withdrawals are inflation-adjusted each year
Success metric is not running out, not legacy

What the 4% rule does not address: longevity beyond 30 years, sequence-of-returns risk in the first 5 years, or behavioral panic-selling in bear markets. Those are exactly where annuities can dominate.

SPIA payout rates today vs the 4% rule

A SPIA (Single Premium Immediate Annuity) is a one-time premium that converts into a stream of monthly checks for life. The payout rate is fixed at issue and includes return of premium plus interest plus longevity credits.

Approximate SPIA payout rates as of mid-2026, $100,000 premium, life-only:

Age	Single Male	Single Female	Joint Life (M+F same age)	4% Rule equivalent
62	~6.30%	~6.00%	~5.50%	4.00%
65	~6.80%	~6.40%	~5.90%	4.00%
70	~7.80%	~7.30%	~6.70%	4.00%
75	~9.20%	~8.50%	~7.70%	4.00%
80	~11.20%	~10.20%	~9.10%	4.00%

At every age 65 and up, the SPIA pays more current income per $100K than the 4% rule. The trade-off: SPIA payouts are level (life-only) or only modestly inflation-protected, while the 4% rule allows the withdrawal dollar amount to rise with inflation each year.

The crossover: when SPIA dominates

The honest comparison is: does the SPIA's higher initial payout, paid for life, beat the 4% rule's lower-but-inflation-adjusted withdrawal over your lifetime?

Two factors determine the answer:

How long you live. SPIA wins big if you outlive average life expectancy. SPIA loses if you die before age 78-82 (depending on issue age).
What inflation does. A high-inflation decade pushes the 4% rule's nominal withdrawal far ahead of a level SPIA payment.

SPIA crossover by issue age (assuming 2.5% inflation):

Issue age	SPIA dominates the 4% rule on cumulative income at age...	Life expectancy (SSA 2026)	Verdict
62 male	~85	~82	Coin flip — SPIA wins for above-average longevity
65 male	~84	~83	SPIA wins for any longevity past average
70 male	~82	~85	SPIA wins — large margin
75 male	~81	~87	SPIA wins — near-certain advantage
80 male	~83	~89	SPIA wins — very large advantage

For women, the crossover ages are roughly 1-2 years older (because female life expectancy is longer, the SPIA payout is lower — the rate compensates the carrier for the longer expected payment stream).

Where the 4% rule beats the SPIA

Three scenarios:

1. Legacy goals

SPIA life-only has zero death benefit. If you die in year 3 with a life-only SPIA, your heirs get nothing. The 4% rule preserves the portfolio — whatever's left passes to heirs.

Fixes: SPIA with period-certain rider (e.g., 20-year certain & life) preserves a minimum payment period. Cash refund SPIA guarantees beneficiaries receive at least premium back. Both reduce the payout rate by roughly 5-15%.

2. High inflation

Level-payment SPIAs lose real purchasing power. A 75-year-old getting $9,200/year today gets $9,200/year in 20 years — which buys what $5,100 buys today (3% inflation). The 4% rule's inflation-adjusted withdrawals defend against this.

Fix: inflation-protected SPIAs exist but typically cost 25-35% lower initial payout, often making them a worse deal mathematically.

3. Early-retirement (under 60)

Below age 60, SPIA payout rates are too low to beat a competently managed portfolio. The 4% rule is built for 30-year retirements; SPIAs work better for 15-25 year horizons.

The MYGA hybrid — the third path

A common Goldstein recommendation: don't pick between the 4% rule and a SPIA — combine them with a MYGA bucket.

The structure:

Floor bucket (40-50% of investable assets): MYGA ladder paying ~5.6% guaranteed for 5-7 years. Locked in. Predictable. Used for fixed living expenses.
Growth bucket (50-60% of investable assets): 60/40 portfolio that funds discretionary spending and inflation hedge. Withdrawal rate from this bucket can safely rise to 5-6% because the floor bucket absorbs sequence risk.

Worked example — 65-year-old retiring with $1.5M, needing $72K/yr (4.8% rate):

Approach	Allocation	Year-1 income	Bear-year withdrawal forced	Legacy at age 90 (median)
Pure 4% rule	$1.5M in 60/40	$60,000	Yes, ~6% of bad-year portfolio	~$1.4M
Pure SPIA	$1.5M into SPIA	$102,000	No (locked income)	$0 (life-only)
4%+MYGA floor	$700K MYGA / $800K 60/40	$39K MYGA + $32K from portfolio = $71K	Optional — MYGA floor covers fixed expenses	~$1.6M (portfolio rides through bear without forced sales)

The hybrid usually wins on the metric most retirees actually care about: not being forced to sell stocks at a 30% drawdown to fund the grocery bill.

The age-by-age decision framework

Simplified rule of thumb:

Under 65: 4% rule or MYGA ladder. SPIA payout too low to compensate for foregone growth.
65-70: MYGA floor (~40% of assets) + 60/40 growth bucket. Defer SPIA decision to age 72+.
70-75: Convert a portion of MYGA to SPIA for permanent income floor. SPIA payouts now compelling.
75+: SPIA dominates on cash flow for any longevity past average. Use 'split-single-premium' — e.g., $300K into a SPIA, $300K stays in MYGA/portfolio.

The single biggest mistake retirees make: locking 100% of liquid assets into a SPIA at age 65. The right move is usually a staged conversion as longevity becomes clearer with each passing year.

Frequently Asked Questions

Is the 4% rule still valid in 2026?

Yes, but with caveats. The original rule assumed 1926-1994 returns and 30-year horizon. Modern research (Morningstar 2023) suggests 3.3-4.0% is safer for 30-year retirements; Bengen himself updated his estimate to ~4.7% in 2022 based on better diversification.

Does the SPIA payout adjust for inflation?

Not unless you buy an inflation-adjusted (or 'CPI-linked') SPIA. These exist but reduce the initial payout by 25-35%, often making them mathematically worse than level-payment SPIAs.

What if I die early with a SPIA?

Life-only SPIA: payments stop, your heirs get nothing. To protect against early death, buy a period-certain or cash-refund SPIA — these guarantee minimum payments to beneficiaries at a 5-15% payout reduction.

Can I 'undo' a SPIA?

Generally no. SPIAs are irrevocable once issued. Some carriers offer a 'commutation option' that lets you sell back the remaining payments at a discount, but this is rare and unfavorable. Plan accordingly.

What's the difference between a SPIA and a DIA?

SPIA = single premium immediate annuity, income starts within 12 months. DIA = deferred income annuity, income starts 2-40 years later in exchange for higher payout. QLAC is a specific tax-qualified DIA inside an IRA.

Are SPIA payments taxable?

Partially. Non-qualified SPIAs (bought with taxable money) have an 'exclusion ratio' — part of each payment is return of principal (not taxed), part is interest (taxed). Qualified SPIAs (bought with IRA money) are 100% ordinary income.

Can I do a 1035 exchange from a MYGA into a SPIA?

Yes. Annuity-to-annuity 1035 exchanges are tax-free. This is the standard pivot strategy: hold MYGA in your 60s for growth, exchange into a SPIA in your 70s for guaranteed income.

Disclosure

This article is general educational information, not personalized financial, tax, or legal advice. All rates, IRS limits, Social Security PIA factors, IRMAA brackets, FDIC/NCUA coverage, and state guaranty fund coverage figures are current as of the publication date and subject to change. IRMAA brackets and Roth/Traditional IRA limits cited reflect IRS guidance for 2026 and may be updated by the IRS or SSA; confirm current figures at irs.gov and ssa.gov before acting. Hans Goldstein is an independent licensed insurance producer (NPN 20602398) appointed with multiple A-rated annuity carriers; he does not sell bank CDs, money market funds, or Treasury securities and is not affiliated with any bank, brokerage, or government agency discussed. No compensation has been received from any third party in connection with this article. Bank CDs are FDIC-insured deposit products; credit union share certificates are NCUA-insured; money market funds are SEC-regulated investment products with no FDIC coverage; Treasuries are direct obligations of the U.S. government; MYGAs are insurance contracts backed by carrier balance sheets and state guaranty associations. These are different product categories with different protections, tax treatments, and trade-offs. Always confirm current rates and tax law with the issuer or a CPA before acting.