I understand your current situation as I also am a federal employee and while I don't have a specific answer for you as to expediting the administrative steps that need to occur to buy back your military service time towards federal retirement I did want to contribute some items that i think are relevant to making sure you are actively working this process in the fastest timeline you can.
1. For your USNA time, please ensure that you do this below step to get your statement of service/estimated earnings from the USNA registrars office.
For me when I bought back my military service time I needed the 2 items:
1. USNA statement of service/estimated earnings to account for those years AND
2. RI-20-97 for my active duty Navy years. You are essentially buying back 2 periods of time so I'm just trying to make sure you see the instructions below from USNA Registrars office. Making the request to USNA registrars office was super quick and I recall getting my letter back within a short timeframe, maybe even same day.
Enrollment and Degree Verifications page for Office of the Registrar at USNA.edu. Updated Thu Feb 06 12:46:25 EST 2025.
www.usna.edu
USNA Alumni
Alumni who need verifications of enrollment or graduation may email requests to
webregistrar@usna.edu. In the requests, please include the name used when you attended, alpha code, and class year. If you are submitting the request for the civilian retirement buy-back purposes, please also indicate if you need us to provide estimated earnings.
If you have done that above step then disregard.
2. You didn't specify what federal agency you are at, but I did want to bring to your attention that for agencies serviced by DFAS there is an option to make payment via the website
www.pay.gov. When you get to the step of making the payment this option would be the "fastest". But as to what timeframe that really means in today's current circumstances, I don't have any idea as to how fast the military deposit paperwork and then personnel action can really happen in real time.
If your agency is not serviced by DFAS then the payment option is to make payment via
Check or Money Order - You can submit payment via check or money order as directed in the military service deposit payment request letter. Your deposit may be made in a single lump sum or installments.
Payment can be made via payroll deduction, but given the expedited timeframe, that option may not be the fastest option if you owe an amount that would cover several pay periods.
Pay.gov - This option is only available to employees of agencies with DFAS serviced payroll In general, if you have a MyPay account, you can use this option. Pay.gov cannot be utilized until after receipt of notification from your payroll office indicating the amount due. Specific information from the notification letter (database and employee ID) is required to complete the form. Payment options include debit cards, checking/saving accounts and PayPal (linked to checking and saving accounts). To quickly and securely submit a payment online, visit Pay.gov here.
3. Lastly, if you do make payment then you MUST make sure you get the letter from your payroll office that is a paid in full letter. The paid in full letter is more of a memo. There isnt a specific form, I have only ever heard it referenced as the Paid in Full Letter, so payroll offices should have a template they use.
Once payroll provided me the paid in full letter which specified the specific military timeframe paid (i.e. BOTH service academy time and the active duty time), its then that the Paid In Full Letter from payroll is provided to HR so that the personnel action is completed to update your SF-50 with a Retirement SCD (Service Computation Dates) and RIF SCD that accounts for the Buy back timeframe. Right now I am seeing people who are at this step, they made their military sevice deposit, but never received from payroll their Paid in Full Letter so then correspondingly they don't have the personnel action SF-50 generated to document their corrected SCD. All I am saying is that making the payment for your military service deposit isn't the end of tracking that the correct steps are then taken between payroll communicating the paid in full to HR then HR being able to document the new SCD date on an SF-50.
If any of the above is not helpful to your specific circumstances then I'm sorry I'm not of further assistance, but I wanted to at least write out some info that maybe others could benefit from.