# Roth Conversion Timing for Large Retirement Savings

> Test if waiting to convert to Roth until retirement saves taxes for households with $2M+ savings.
- Title: Roth Conversion Timing for Large Retirement Savings | Shortify
- Summary: Test if waiting to convert to Roth until retirement saves taxes for households with $2M+ savings. Households with $2 million or more in pre-tax savings…
- Keywords: roth conversion, tax planning, retirement savings, 401k, ira, social security, medicare irmaa, tax bracket, income distribution, estate planning, Roth, Conversion
- Source: Kiplinger — https://kiplinger.com/retirement/retirement-planning/can-your-roth-conversion-wait-until-you-retire
- Published: 2026-10-25T15:00:00+00:00
- Read time: 1 min
- Topics: roth conversion, tax planning, retirement savings, 401k, ira, social security, medicare irmaa, tax bracket, income distribution, estate planning
## Pre-retirees' tax strategy
Pre-retirees with large 401(k)s often say they'll wait until retirement to pay taxes as income drops.

> We'll wait until we retire. Our income will drop, and we'll be in a lower bracket.
## The $2 million threshold
For households with $2 million or more in pre-tax savings, focusing on future tax rates is more useful than waiting until retirement.
## Tax impact of pre-tax savings
Pre-tax savings grow with investments but eventually become taxable income, increasing the tax bill over time.
## Required minimum distributions
RMDs begin at age 73 or 75 for those born in 1960 or later, adding taxable income regardless of need.
## Social Security tax risks
Higher income can make up to 85% of Social Security benefits taxable and trigger Medicare IRMAA surcharges.
## Inherited tax burden
Children inherit tax bills from pre-tax accounts, often during their peak earning years, increasing lifetime tax costs.
## Roth conversion benefits
Roth conversions provide more control over withdrawals and avoid increasing taxable Social Security or Medicare premiums.
## Roth conversion costs
Conversions raise current tax bills, push into higher brackets, and trigger Medicare premiums two years later.
## Testing conversion timing
To test if waiting saves taxes, sort savings by tax treatment and project income across both spouses' lifetimes.
## Step-by-step testing
Convert in pieces, line up tax payments first, and run projections for both spouses and heirs to find the optimal timing.
## The real decision
The best time to convert depends on individual circumstances, not a one-size-fits-all approach to retirement tax planning.
## Key takeaway

Households with $2 million or more in pre-tax savings should test whether delaying Roth conversions until retirement reduces lifetime taxes.