TSP withdrawals in retirement

Most TSP advice is about getting money in. But the decisions at the other end - how and when you pull money out - carry just as much weight, and service members reach them unusually young. A 42-year-old retiree with a TSP faces decades of withdrawal decisions, a pension running alongside, and tax rules that reward planning and punish autopilot. Understanding your options before you need the money keeps a career's worth of saving from being eroded by avoidable taxes and penalties.

Your core withdrawal options

The TSP gives you several ways to access the money: keep it in the plan and take installment payments (fixed dollar amounts or based on life expectancy), take partial or full lump-sum withdrawals, purchase a life annuity that converts a chunk into guaranteed income, or roll the balance to an IRA for more flexibility. You can also leave it invested and simply let it grow if you don't need it yet - the TSP's rock-bottom fees make it a fine place to keep money parked.

Traditional vs. Roth withdrawals

If you contributed to both traditional and Roth TSP over your career, they come out differently. Traditional withdrawals are taxed as ordinary income; qualified Roth withdrawals (generally after age 59-and-a-half and a five-year holding period) are tax-free. That difference is a planning tool: in low-income years - like the gap between separation and a second career hitting full stride - you can draw from traditional at a low tax rate, and save Roth for higher-income years or leave it to grow tax-free the longest.

Coordinating with the pension and other income

1. Treat the pension as your income floor and the TSP as the flexible layer on top - you don't have to draw the TSP the moment you retire.
2. In low-income transition years, consider drawing traditional dollars (or doing Roth conversions) while your tax bracket is low.
3. Let Roth balances grow the longest - they're tax-free and have friendlier RMD rules.
4. Weigh a partial rollover to an IRA if you want Roth-conversion flexibility or investments the TSP doesn't offer - but respect the TSP's unbeatable fees.

The bottom line

How you take money out of the TSP is as consequential as how you put it in - especially for retirees who reach the decision decades early. Know your options, almost never cash out (the tax-and-penalty hit is brutal), use low-income transition years to draw traditional dollars or convert to Roth cheaply, let Roth grow the longest, and coordinate withdrawals with your pension and RMD rules. This is genuinely tax-and-investment-complex territory where a fee-only advisor or CPA earns their keep - the goal is making a career's worth of contributions last a retirement, not handing a third of it to avoidable taxes.