Military time in service requirements govern four things at once: how fast your basic pay rises, when you become eligible for promotion, how long you can stay at a given rank before the service forces you out, and whether you qualify for a pension. Every branch tracks time in service (TIS) under the same federal framework, and the thresholds inside that framework are what decide the money in your paycheck now and the check you receive after you take off the uniform.
How Your Time in Service Is Counted
TIS for pay purposes runs from your Pay Entry Base Date (PEBD), which appears in block 4 of your Leave and Earnings Statement.1Defense Finance and Accounting Service. Military Buy Back Field Definitions PEBD is not the same as your Active Duty Service Date, which marks the start of full-time active service and appears on your DD Form 214. PEBD can be adjusted backward to credit earlier service or pushed forward to account for gaps.
Federal law sets what counts. Under 37 U.S.C. § 205, creditable time includes all active duty, all enlisted or commissioned service in any regular or reserve component, and National Guard service, along with time on the temporary disability retired list and certain historical categories.2Office of the Law Revision Counsel. 37 USC 205 – Computation of Years of Service No period is counted twice. Service performed before age 18 still counts.
Reserve and Guard Points
Reservists and Guard members earn TIS through points rather than calendar time: one point per day of active duty, one per drill, one per day of funeral honors duty, and 15 membership points per year in a reserve component.3Military Compensation and Financial Readiness. Reserve Retirement For retirement math, total points divided by 360 gives creditable years. A year with at least 50 points counts as a qualifying year toward reserve retirement eligibility.
Breaks and Corrections
If you leave the service and return, your PEBD is recalculated using your prior DD-214 (or a Statement of Service if you no longer have the DD-214) so the gap is subtracted from your cumulative time. If you find an error in your dates, each branch operates a Board for Correction of Military Records. Under 10 U.S.C. § 1552, the Secretary of your military department can correct a record to fix an error or remove an injustice, and you generally must file within three years of discovering the problem.4Office of the Law Revision Counsel. 10 USC 1552 – Correction of Military Records
Pay Raises Tied to Years of Service
Basic pay climbs automatically as your TIS crosses set thresholds, a mechanism the military calls longevity. The 2026 pay tables set raises at less than 2 years, then at 2, 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, and 40 years.5Defense Finance and Accounting Service. Military Pay Tables The raises come frequently early on and stretch to two-year intervals after the ten-year mark.
Where longevity stops depends on your rank. An E-7 sees no further raises after 26 years, and an E-8 tops out at 30. Only an E-9 continues to receive longevity increases out to 40 years.6Defense Finance and Accounting Service. Basic Pay – Enlisted Once you hit your rank’s cap, basic pay is flat unless you promote.
Time in Service Gates for Promotion
Promotions split into two tracks. From E-1 through E-4, advancement is largely automatic once you clear the required months of service and your commander recommends you; the exact months differ by branch, but the pattern is a short staircase measured in months, not years.7MyNavyHR. Navy-Wide Apprentice E1-E4 Advancement Changes Fact Sheet
At E-5 and above, promotions are competitive. A board evaluates your record, weighing total TIS alongside Time-in-Grade, which is how long you have held your current rank. Both matter: TIS shows career breadth, and Time-in-Grade shows you have had enough time to master your current level.
Officer promotions follow the Defense Officer Personnel Management Act framework. Minimum time-in-grade is 18 months as an O-1, two years as an O-2, and three years each for O-3 through O-5. In practice, the typical timeline puts officers before an O-4 board around 9 to 11 years of commissioned service, O-5 at roughly 15 to 17 years, and O-6 around 21 to 23 years. Selection rates vary by branch and specialty.
High Year Tenure: When TIS Forces You Out
High Year Tenure (HYT) is the “up or out” rule. Each pay grade has a maximum number of years you can serve without promoting, and reaching that ceiling without a promotion triggers mandatory separation. The Navy’s current gates show the shape of the policy:
- E-4: 10 years active duty (14 years reserve)
- E-5: 16 years active duty (20 years reserve)
- E-6: 22 years active duty (22 years reserve)
- E-7: 24 years active duty (24 years reserve)
- E-8: 26 years active duty (26 years reserve)
- E-9: 30 years active duty (30 years reserve)
Other branches set their own limits and adjust them periodically based on retention needs.9United States Air Force. High Year of Tenure Changes Explained Hitting HYT typically ends in an honorable discharge. Members who have passed 20 years may be eligible for retirement instead. Waivers exist where a branch has a critical need for your specialty, but a waiver is not a career plan.
The 20-Year Threshold for Retirement
Twenty years is the single most consequential number in a military career. Reaching it unlocks a lifetime pension; falling short by a day means no pension under the standard rules. How the pension is calculated depends on which system covers you.
Legacy High-3
If you entered before January 1, 2018, and did not opt into the newer system, you fall under High-3. Retired pay equals 2.5 percent of the average of your highest 36 months of basic pay, multiplied by your years of service.10Department of Defense. Frequently Asked Questions Regarding the New Blended Retirement System At 20 years, that is 50 percent of your high-3 average. Thirty years produces 75 percent. Federal law authorizes retirement with 20 or more years of service for both enlisted members and officers.11Office of the Law Revision Counsel. 10 USC Chapter 741 – Retirement for Length of Service
Blended Retirement System
Anyone who first entered a uniformed service on or after January 1, 2018, is automatically enrolled in the Blended Retirement System (BRS). The 20-year requirement is unchanged, but the multiplier drops to 2.0 percent per year, so a 20-year retiree receives 40 percent of the high-3 average rather than 50.10Department of Defense. Frequently Asked Questions Regarding the New Blended Retirement System To offset the lower pension, the government automatically contributes 1 percent of your basic pay to the Thrift Savings Plan and matches up to another 4 percent of your own contributions. You vest in the automatic contributions after two years of service, measured from your PEBD.
BRS also includes continuation pay, a midcareer bonus. Under 37 U.S.C. § 356, you become eligible after completing at least 7 but no more than 12 years of service. In exchange for at least 3 more years of service, active-duty members receive a lump sum of at least 2.5 times monthly basic pay, with the exact multiplier set by each branch and potentially reaching 13 times monthly pay. Reserve and Guard members in drilling status receive a minimum of 0.5 times monthly basic pay.12Office of the Law Revision Counsel. 37 USC 356 – Continuation Pay Failing to complete the added obligation can trigger repayment.
Reserve Retirement
Reserve and Guard members qualify for retirement after 20 qualifying years (each with at least 50 points), but payments generally do not begin until age 60.13Office of the Law Revision Counsel. 10 USC 12731 – Age and Service Requirements For qualifying active-duty service performed after January 28, 2008, the eligibility age drops by three months for every 90 cumulative days of active duty in a fiscal year, with a floor of age 50.
Disability Retirement
The 20-year rule disappears if you are medically retired under Chapter 61 of Title 10. Under 10 U.S.C. § 1201, you can be retired at any point in your career if the disability is permanent and stable, rated 30 percent or higher, not the result of misconduct or willful neglect, and meets one of the required service-connection tests.14Office of the Law Revision Counsel. 10 USC 1201 – Retirement for Physical Disability Members with fewer than 20 years rated below 30 percent receive disability severance pay instead of ongoing retired pay.
Getting Credit for Military Service in a Federal Civilian Job
If you move from the military into federal civilian employment, your active-duty years can count toward Federal Employees Retirement System (FERS) retirement, but only if you pay a deposit. The deposit is 3 percent of the military basic pay you earned during the period being credited.15U.S. Office of Personnel Management. Service Credit The payment must be complete before you leave federal service.
Newly hired federal employees have roughly two to three years to pay the deposit interest-free. After that window, interest compounds annually on the unpaid balance. The service being credited must have ended with an honorable discharge.16U.S. Office of Personnel Management. Creditable Service Skip the deposit, and your military years do not count toward the FERS pension calculation or your civilian retirement eligibility date. Paying while the interest clock is still off is almost always cheaper than the lifetime pension increase it produces.
Where to Verify Your Own Numbers
Your Leave and Earnings Statement shows your current years of service for pay. When you separate, the DD Form 214 becomes your permanent record of total creditable service, character of discharge, and separation details.17National Archives. DD Form 214 – Discharge Papers and Separation Documents Check both against the promotion, HYT, and retirement thresholds that apply to your grade before you rely on any career decision that depends on a specific date.