When changing your Thrift Savings Plan (TSP) contributions. three dollar limits that apply The annual limit  is $20,500. This limit is to the combined total that you can contribute in 2022 to your Traditional and Roth TSP combined. This limit does not apply to Traditional TSP contributions made from combat pay. The next limit  is $6,500 on additional catchup contributions for those turning age 50 or older in 2022. So if that's you, can make total TSP contributions of up to $27,000. For military in a combat zone, your contributions toward the catch-up limit must be Roth. And you can't contribute toward the catch-up limit from incentive pay, special pay, or bonus pay.

The third limit  is the $61,000 Annual Addition. Its the total amount of all the contributions that can be made to your TSP a year. This limit is includes your employee contributions and for you BRS military and FERS civilians the Automatic 1% Contributions, and up to 4% Matching Contributions. It doesn't include catch-up contributions. The annual addition limit affects mostly our military service members who can contribute tax-exempt pay earned in a combat zone up to this  limit.

Next decide how much your can and want to contribute. Remember with ROTH TSP, you pay your income taxes now, up front on your contributions. So you will have less money paycheck each pay period when you contribute to ROTH TSP than if you contribute to Traditional TSP. YFor more info listen to Episode 28 Meet ROTH and Episode 30 To ROTH or Not to ROTH.

Civilian employees usually designate a dollar amount to contribute from each paycheck, while our service members will need to elect a percentage. FERS civilians and BRS military, in order to get your full match, you need must contribute at least 5% of your pay in every single pay period to get your full match. If you hit one of those limits before the end of the year, you give up that match from your pay for the rest of the year. Check out their online Elective Deferral Calculator .  You’ll need your most recent LES and guess how many pay periods it will take your personnel center to make the change to your pay. For Military and DoD civilians, MyPay says, it will be effective at the beginning of the next pay period. So enter 0 for this box. 

The calculator will give you the new amount you can contribute each remaining pay period if you want to maximize your contributions for 2022. Pick what you can afford, or that max number from the website, whichever is lower for your contribution.

Next use your electronic payroll system to change your TSP contributions. For  military service members and DoD civilians thats myPay. For other for federal employees there are other payroll systems, like Employee Express, EBIS/GRB, LiteBlue, and NFC EPP. 

Generally, feds will use enter the dollar amount and service members a percentage of your pay. Military can keep this simple by contributing from your base pay. Take the monthly TSP contribution you want to make, divided by your monthly base pay, times 100

Then go to myPay and log in. Under the “PAY CHANGES” heading, select the “Thrift Savings Plan (TSP)” link. Then click the yellow pencil icon to make a change to your TSP contribution. Enter your changes in the pop-up window. Enter that percentage in the base pay box for either Traditional TSP or ROTH TSP or split between both. There’s boxes to enter percentages for other pays  as well.

Then click Continue to review then Submit.