New Catch Up Contributions rules in 2026.

Do you already max out a Roth IRA?

Do you plan to retire at MRA, or are you eligible for a VERA if they offer those again to some this year (and if they do, would you take it)?

I like the Roth IRA for ability to withdraw the contributions early.

Once separated, you'll be able to roll Roth TSP into a Roth IRA and then access your contributions tax-and-penalty-free. You'd still need to leave the gains alone until 59 1/2 (and applicable 5 year rule), but at least you could access some at that point.

Will your pension keep you out of the 0% taxable gains bracket (or pension + desired Roth conversion/traditional withdrawal)?

Do you think you'll need to access these funds before retirement?

All of that plays into what I would do.

Charlie...

I just responded to a similar question in the community, and your note raises many of the same underlying issues about where the “next dollar” should go once retirement accounts are maxed. Given that, I wanted to provide a perspective here as well.

First, you’re in a strong financial position. At age 50, fully maxing your TSP (one of the most efficient and low-cost retirement plans available) is an exceptional foundation. Asking whether catch-up contributions should go into the Roth TSP or instead be redirected to a taxable brokerage is a great strategic question to ask.

The short answer is that there are advantages to holding money in both the Roth portion of your TSP and a taxable brokerage account. Each account type serves a different purpose. Over time, having assets distributed across Roth, traditional tax-deferred, and taxable accounts give you far greater flexibility for retirement income planning, tax optimization, and cash-flow management.

Your question focuses specifically on whether Roth TSP catch-up contributions (now mandatory for high-income earners beginning in 2026) offer enough benefit compared to funding a taxable brokerage instead. To evaluate this, consider the following framework:

1. Tax Treatment and Long-Term Value

   • Roth TSP Catch-Up: Contributions are after-tax, but all future growth is entirely tax-free. This is the core benefit. You are effectively creating a pool of tax-exempt income for retirement, which is extremely valuable for controlling taxes later in life.
   • Taxable Brokerage: Contributions are after-tax and all future dividends, interest, and realized capital gains are taxable. Tax rates are often favorable, but not zero.

2. Access to Funds Before Age 59½

   • Roth TSP: Funds generally cannot be accessed without penalty until 59½ unless you separate from government service in the year you turn 55 or later (the “Rule of 55”). This is an important nuance.
   • Taxable Brokerage: Full liquidity. No restrictions, no penalties. This is the main reason many people prefer to divert at least some funds into taxable accounts once tax-advantaged space is filled.

3. Investment Flexibility

   • TSP Roth: Very low-cost funds, but a limited menu. The simplicity and cost efficiency are strengths, but you have fewer levers to pull.
   • Taxable Brokerage: Complete flexibility. You can invest in any ETF, fund, or strategy you prefer, and employ tax-loss harvesting when markets decline; something that can meaningfully improve long-term after-tax results.

4. Retirement Distribution Planning

   • Roth TSP: Converting Roth TSP assets to a Roth IRA after separation removes required minimum distributions (RMDs), turning them into fully optional withdrawals. This is a major advantage of accumulating Roth balances.
   • Taxable Brokerage: This account type is ideal for early retirees who want to control their taxable income, live off capital gains, or bridge to later retirement accounts.

5. “Since It’s After-Tax Anyway…” This is a common point of confusion. Yes, both Roth contributions and taxable brokerage investments use after-tax dollars. But the future tax treatment of growth is drastically different. The Roth TSP eliminates taxes on gains permanently. The taxable account defers and reduces taxes but does not eliminate them.

When you weigh these considerations, it becomes less about which option is universally “better” and more about what you value at this stage: maximum long-term tax freedom (Roth TSP) or maximum liquidity and flexibility (taxable brokerage).

Given your age and the mandatory Roth catch-up rule, many high-income earners choose a blended strategy: continue maxing TSP (including the catch-up) to lock in tax-free retirement income, while simultaneously building or expanding a taxable account to create an accessible, penalty-free pool of funds.

Both choices are strong. Both contribute meaningfully to financial independence.

Wishing you continued success on your FI journey. You’re asking thoughtful questions and clearly making disciplined decisions, exactly what leads to long-term financial flexibility and confidence.

~ Coach Holdren

Consider giving some thought to tax diversification. Make sure you're saving some money into each of tax-deferred, tax-sheltered and taxable accounts. That will give you the most flexibility during retirement. For me, I'll direct the catch-up contribution to my taxable account to give myself more space to do Roth conversions in early retirement while funding my life from the taxable account. This is the spending strategy suggested by Michael Kitces' research.

As a heads up, be aware of the NIIT threshold. Not being able to direct that 2026 catch-up contribution to pre-tax could push you into NIIT territory.

Here's the Michael Kitces article if interested.

Tax-Efficient Retirement Portfolio Spending Strategies

The most tax-efficient retirement spending is not to liquidate IRAs first nor last, but to spend taxable accounts while doing partial Roth conversions!

Nerd's Eye View | Kitces.com