Military Leave Carryover & Sell-Back Optimizer

Planning around the fiscal-year leave cap

Introduction to use-or-lose leave and why the cap sneaks up on people

Uniformed service members generally accrue 2.5 days of leave per month — 30 days a year. At the end of each fiscal year (30 September), unused leave above a set cap is forfeited. The standard ceiling is 60 days, but Special Leave Accrual (SLA) can temporarily raise it — typically to 90 or 120 days — when authorized for qualifying circumstances such as certain deployments or contingency operations.

The practical challenge is timing: leave is easy to accumulate during high-tempo periods, and it is hard to schedule large blocks late in the year when everyone else is trying to take time off too. A member sitting at 58 days in June with a busy fall ahead is already in trouble — they just do not know it yet. A simple projection (current balance + expected accrual − planned usage) surfaces that risk months early, while there is still calendar left to fix it. That projection is exactly what this optimizer runs, and the chart below the form draws your month-by-month trajectory against the cap so the crossing point is visible, not hypothetical.

How to use the leave carryover optimizer

1. Current leave balance (days): copy the leave balance from your most recent LES. Decimals are fine (e.g., 35.5).
2. Months left in fiscal year: whole months remaining until 30 September (constrained to 1–12).
3. Leave days you plan to use: the total days you already intend to take before the fiscal year ends.
4. SLA authorized? Select "No" for the standard 60-day cap, or the 90/120-day cap that matches your orders.
5. Deployment/accrual offset: any additional credited days beyond standard accrual; leave at 0 if none.
6. Daily basic pay: used only for the sell-back estimate. Statutory sell-back pays 1/30 of monthly basic pay per day, so monthly basic pay ÷ 30 is the right number to enter.

Press Calculate leave plan, then drag the what-if slider to see how scheduling extra days changes the projection in real time — the chart redraws and the use-or-lose figure updates as you move it. The CSV download captures the full scenario for your records or a conversation with your chain of command.

Leave projection formulas and the assumptions inside them

The projection model is deliberately simple enough to check by hand. Accrual over the remaining months is:

The projected end-of-fiscal-year balance subtracts planned usage:

Days above the cap are at risk, and the gross sell-back value prices them at daily basic pay:

Assumptions worth knowing: "months left" is treated as full months at 2.5 days each, with no proration of partial months; planned usage and any offset are spread evenly across the remaining months in the chart; and the model does not stop a projection from going negative — if you plan to use more leave than you will have, the negative number is the signal to revisit the plan, not a bug.

Sources: leave accrues at 2.5 days per month of active service and unused leave above 60 days is forfeited at fiscal-year end, with SLA exceptions up to 120 days, under 10 U.S.C. §701; sell-back is limited to 60 days per career and paid at 1/30 of monthly basic pay per day (basic pay only, no allowances) under 37 U.S.C. §501, as implemented in DoD Financial Management Regulation 7000.14-R, Volume 7A, Chapter 35. Last reviewed July 2026.

Worked example: 58 days on the books with four months left

Suppose your LES shows 58.0 days, there are 4 months left in the fiscal year, you plan to take 6 days, you have no SLA, and no offset days.

• Accrual = 2.5 × 4 + 0 = 10.0 days
• Projected balance = 58.0 + 10.0 − 6.0 = 62.0 days
• Cap = 60 days, so use-or-lose = 62.0 − 60 = 2.0 days

You would want to schedule at least 2 more days before 30 September (or confirm whether SLA raises your cap). If you were separating and eligible to sell those days back at an estimated $250/day of basic pay, the gross value would be 2 × 250 = $500 — before taxes, and it would consume 2 of your 60-day career sell-back allowance.

• Projected end-of-year balance is your estimated balance on the last day of the fiscal year.
• Use-or-lose risk is the number of days above the selected cap; 0 means no projected forfeiture under that cap.
• Days to schedule equals the use-or-lose amount — taking that many additional days brings you down to the cap in this model.
• Potential sell-back value is gross; taxes and eligibility rules change the net amount significantly.

Take the leave or sell it back: what the numbers can and cannot say

Selling leave back (when eligible) converts days into taxable income at your basic pay rate — and only basic pay: the statutory payment includes no BAH, BAS, or special pays, which is why a day sold is financially thinner than a day of paid leave taken, during which all of those allowances continue. Taking leave produces no cash, but it buys recovery, family time, and readiness that the calculator cannot price. A practical sequence many members use:

• First, prevent forfeiture: schedule enough leave to stay at or below your cap — forfeited days are worth exactly zero.
• Second, if separating or reenlisting and eligible, weigh selling back days against the 60-day career limit and the tax bite.
• Third, keep a buffer for the unexpected: medical needs, family emergencies, PCS timing.

Scenario table: how balance, months, and caps interact

The table shows how the projection moves with different starting balances and caps. Your actual numbers should come from your LES.

Limitations of this leave projection

This calculator is a planning aid and intentionally simplifies several real-world rules. Keep these limitations in mind:

• Official balances: your LES and finance office are the authoritative sources for your balance and any SLA authorization.
• Accrual timing: the model assumes 2.5 days per remaining full month and does not prorate partial months or mid-month status changes.
• SLA details: SLA requires qualifying conditions and documentation; protected days expire on service-specific schedules this tool does not track.
• Sell-back eligibility: sell-back is tied to reenlistment, separation, or retirement and to the 60-day career limit; the tool does not validate your eligibility or remaining capacity.
• Taxes: the sell-back figure is gross — federal and state withholding will reduce the net payment.
• Service-specific nuances: leave donations, advance leave, terminal leave strategy, and component policies are not modeled.

Leave cap questions service members ask