TIPS Ladder as a Withdrawal Strategy
Morningstar’s research highlights building a ladder of Treasury Inflation-Protected Securities (TIPS) as a highly efficient withdrawal strategy. At the real yields available when Morningstar ran the analysis, a 30-year ladder supported a guaranteed real withdrawal rate of about 4.6%, backed by the full faith and credit of the U.S. government. Recompute the rate at the real yield on the day you build it — the supportable rate is a direct function of the TIPS curve, and it has ranged from under 3% to over 5% within a single decade.
The guarantee applies strictly to the cash flows, not your longevity. A 30-year ladder is exhausted in year 30 and pays nothing in year 31. It eliminates market risk and inflation risk over its term while leaving longevity risk entirely uncovered, which is the opposite of what a 65-year-old couple with a meaningful chance of one survivor reaching 95 actually needs. Use the ladder to bridge to a guaranteed lifetime floor — delayed Social Security, a QLAC, or a SPIA — not as the terminal floor itself.
Mechanics You construct a portfolio of TIPS with staggered maturities ranging from 1 to 30 years. Each year, a portion of the ladder matures, providing you with inflation-adjusted principal and interest. By year 30, the ladder is completely spent (self-liquidating), leaving no residual balance.
The Phantom Income Trap While elegant in theory, holding a large TIPS ladder inside a taxable brokerage account during periods of high inflation is a tax disaster. Under the inflation-indexed debt instrument rules of Treas. Reg. §1.1275-7, the IRS taxes the annual principal inflation adjustments as ordinary income in the year they accrue, even though you do not receive the cash until the bond matures. This “phantom income” can create a massive, unfunded tax liability. A top-bracket retiree facing a 6% CPI print on a $1M TIPS ladder accrues $60,000 of phantom interest and owes in cash tax on money they have not received.
Note what is not in that 40.8%. TIPS are obligations of the United States, so both the coupon and the inflation accretion are exempt from state and local income tax under 31 U.S.C. § 3124(a) — a California retiree does not add 13.3% here, and the usual stacked California bracket overstates the damage by roughly a third. The federal 37% plus the 3.8% NIIT is the whole bill. That state exemption is also precisely why a TIPS ladder beats a comparable-yield corporate or municipal ladder for a high-tax-state resident on an after-tax basis — phantom income is purely a timing friction, not a structural rate penalty.
Unbreakable Rule: Build TIPS ladders strictly inside tax-advantaged wrappers — ideally Traditional, since Roth space is better spent on growth assets — where phantom income accrues invisibly.