Active duty? Your Roth TSP contributions may stop unless you act Published Nov. 19, 2014 By Staff Reports 366th Airman & Family Readiness Center MOUNTAIN HOME AIR FORCE BASE, Idaho -- If you are an active-duty member making dollar-amount Roth contributions to your Thrift Savings Plan account, these deductions will stop Jan. 31, 2015, unless you act. How your election requirements will change: An upcoming change in myPay will require you to designate your Roth contributions as a percentage of your pay, not a dollar amount. If you don't comply with this change, then the Defense Finance and Accounting Service will not be able to process your Roth contributions. This change affects your Roth contributions only; your traditional contributions are already designated as a percentage of pay. When the change will take place: The new requirement will take effect Jan. 1, 2015. You will have 30 days to change your Roth election from a dollar amount to a percentage of your pay. If your new Roth election is not received by Jan. 31, 2015, then DFAS will not be able to process your Roth contributions until you update them. How to make the change: Log into myPay. You'll see a special TSP section labeled "Traditional TSP and Roth TSP" -- click there. Then, in the "Contribution from Roth TSP" section, you can enter the percentage of your pay that you'd like to contribute (10 percent, for example). Finally, click "Save" at the bottom of the screen. Why Roth contributions might be good for you: When you make Roth contributions, you pay taxes on the money you save before it goes into your TSP account. So you pay no income taxes when you take it out, and your earnings can also be tax-free if you have reached age 59½ or have a permanent disability and five years have passed since the year of your first Roth contribution. As a member of the uniformed services, you can make Roth contributions from tax-exempt pay, basic pay, incentive pay, special pay and bonus pay. If you make Roth contributions from tax-exempt pay earned in a combat zone, you won't pay taxes on your contributions, and you'll have the opportunity for tax-free growth.