# Which Account Goes First? The Question Every Couple With $1.4 Million Should Answer Before 65

> Couples with $1.4M must decide which account to touch first before 65 to avoid Medicare surcharges.
- Title: Which Account Goes First? The Question Every Couple With $1.4…
- Summary: Couples with $1.4M must decide which account to touch first before 65 to avoid Medicare surcharges. A 63-year-old couple with $1.4 million must convert…
- Keywords: 401(k), roth ira, social security, medicare, irmaa, tax bracket, retirement planning, marginal tax rate, business, finance, Which, Account
- Source: Yahoo Finance — https://finance.yahoo.com/markets/articles/account-goes-first-every-couple-153512820.html
- Published: 2026-09-17T15:35:12+00:00
- Read time: 1 min
- Topics: 401(k), roth ira, social security, medicare, irmaa, tax bracket, retirement planning, marginal tax rate, business, finance
## The 63-Year-Old Couple's $1.4 Million Challenge
A 63-year-old couple with $1.4 million across traditional 401(k), Roth IRA, and taxable brokerage accounts must act before 65 to avoid Medicare surcharges.
## Medicare's Two-Year Lookback Trap
Medicare uses a two-year lookback on modified adjusted gross income to set Part B and Part D premiums, meaning 2026 withdrawals affect 2028 IRMAA surcharges.
## The 22% Tax Bracket Ceiling
The 22% tax bracket ceiling at $206,700 allows couples to run partial Roth conversions from 401(k) to shrink the traditional balance before RMDs hit at 73.
## Tax Cascade Risk
If 85% of Social Security becomes taxable and IRMAA surcharges stack, a couple in the 22% bracket faces an effective marginal tax rate near 40% on 401(k) withdrawals.
## The Three Actions Before 65
Model a conversion ladder to the 22% bracket ceiling, build a two-year Treasury reserve, and coordinate Social Security claiming with the conversion window.
## Why 63 to 65 Is Critical
Inaction between 63 and 65 can push effective marginal tax rates near 40% when 85% of Social Security becomes taxable and IRMAA surcharges stack simultaneously.
## The Consequence of Doing Nothing
A couple in the 22% bracket triggering both IRMAA and Social Security taxation faces an effective marginal tax rate near 40% on the next dollar of 401(k) withdrawal.
## Key takeaway

A 63-year-old couple with $1.4 million must convert 401(k) to Roth IRA before 65 to prevent 40% tax rates from Social Security and IRMAA surcharges.