Military & Government
Military Leave Carryover & Sell-Back Optimizer
Project your end-of-fiscal-year leave balance, identify use-or-lose risk, and estimate the gross value of selling days back (when eligible) under common caps.
How this leave carryover calculator works
This page helps you plan around the fiscal-year leave cap (often called “use-or-lose”). You enter your current leave balance, how many months remain in the fiscal year, and how many days you expect to take before the fiscal year ends. The calculator then projects your end-of-year balance using a standard accrual rate and compares it to a cap (60 days by default, or 90/120 days if Special Leave Accrual (SLA) is authorized).
If your projected balance exceeds the cap, the excess is shown as use-or-lose days. The tool also estimates a gross sell-back value by multiplying those excess days by the daily basic pay you provide. (Taxes, eligibility rules, and career sell-back limits are not modeled—see limitations.)
Inputs (what to enter)
- Current leave balance (days): Your current leave balance from your LES (in days). If your LES shows half-days, you can enter decimals (e.g., 35.5).
- Months left in fiscal year: Whole months remaining until the fiscal year ends. The calculator constrains this to 1–12.
- Leave days you plan to use before fiscal year ends: The total days you expect to take between now and the end of the fiscal year.
- Special Leave Accrual (SLA) authorized?: Select “No” for the standard 60-day cap, or select the SLA cap that applies to your orders (90 or 120).
- Days earned from deployment or imminent danger pay period (monthly accrual bumps): Any additional leave credit you want to add on top of standard accrual. If none, leave at 0.
- Daily basic pay (for sell-back value): Your estimated daily basic pay used to compute gross sell-back value. Many members approximate this as monthly base pay ÷ 30.
Formulas and assumptions used
The calculator uses a straightforward projection model:
- Accrual = 2.5 × (months left) + (deployment offset)
- Projected balance = (current balance) + (accrual) − (planned usage)
- Cap = 60 days unless you select an SLA cap (90 or 120)
- Use-or-lose = max(0, projected balance − cap)
- Gross sell-back value = (use-or-lose) × (daily basic pay)
Notes: This model treats “months left” as full months at 2.5 days/month and does not attempt to prorate partial months. It also does not prevent negative projected balances; if you plan to use more leave than you will have, the projection can go below zero, which is a signal to revisit your plan.
Worked example (realistic scenario)
Suppose your LES shows 58.0 days of leave, there are 4 months left in the fiscal year, and you plan to take 6 days of leave. You do not have SLA, and you have no additional offset days.
- Accrual = 2.5 × 4 + 0 = 10.0 days
- Projected balance = 58.0 + 10.0 − 6.0 = 62.0 days
- Cap = 60 days
- Use-or-lose = 62.0 − 60 = 2.0 days
In this example, you would want to schedule at least 2 additional days before the fiscal year ends (or confirm whether you have SLA that raises your cap). If you were eligible to sell back those days and your daily basic pay estimate is $250/day, the gross sell-back estimate would be 2 × 250 = $500.
How to interpret the results
- Projected end-of-year balance is your estimated balance on the last day of the fiscal year based on the inputs.
- Use-or-lose risk is the number of days above the selected cap. If it is 0, you are not projected to forfeit days under that cap.
- Days to schedule equals the use-or-lose amount. Scheduling that many days (or more) should bring you down to the cap in this simplified model.
- Potential sell-back value is a gross estimate only. Actual sell-back rules and taxes can change the net amount significantly.
Limitations and assumptions (read before relying on the output)
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 leave balance and any SLA authorization.
- Accrual timing: The model assumes 2.5 days per remaining month and does not prorate partial months or account for mid-month changes.
- SLA details: SLA is not automatic; it requires qualifying conditions and official orders. The correct cap and expiration depend on your situation.
- Sell-back eligibility: Sell-back is typically tied to separation/reenlistment/retirement rules and career limits. This tool does not validate eligibility or remaining career sell-back capacity.
- Taxes and deductions: The sell-back value shown is gross and does not include federal/state taxes, withholding, or other deductions.
- Service-specific nuances: Donations, advanced leave, special programs, and component-specific policies are not modeled.
Planning guide: avoid use-or-lose and compare options
Uniformed service members generally accrue 2.5 days of leave per month. At the end of each fiscal year, unused leave above a set cap can be forfeited. The commonly referenced ceiling is 60 days, but Special Leave Accrual (SLA) can temporarily raise the cap (often to 90 or 120 days) when authorized by orders 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 can be difficult to schedule large blocks late in the year when many people are trying to take time off. A simple projection—current balance + expected accrual − planned usage—helps you spot risk early enough to coordinate with your chain of command.
Accrual and cap details (plain language)
The calculator’s projection is intentionally simple so it can be used quickly. It assumes you will accrue 2.5 days for each remaining month in the fiscal year, then subtracts the leave you plan to take. It then compares your projected balance to the cap you selected.
If you are close to the cap, consider building a buffer. For example, if the projection shows 1–2 days of use-or-lose, a single unexpected schedule change could push you into forfeiture. Conversely, if you are far below the cap, you may have flexibility to save leave for PCS, family events, or future needs.
Use leave vs sell back: what the numbers can and cannot tell you
Selling leave back (when eligible) converts days into taxable income at your basic pay rate. Taking leave provides no direct cash payment, but it can be valuable for recovery, family time, and long-term readiness. The calculator shows the gross sell-back estimate so you can compare scenarios consistently, but it cannot measure the non-monetary value of time off.
A practical approach many members use is:
- First, prevent forfeiture by scheduling enough leave to stay at or below your cap.
- Second, if you are separating and eligible, evaluate whether selling back some days makes sense given taxes and career limits.
- Third, keep a reasonable balance for unexpected needs (medical appointments, family emergencies, PCS timing, etc.).
Scenario table (illustrative)
The table below shows how the projection changes with different starting balances and caps. These are examples to help you think through scenarios; your actual numbers should come from your LES and your plan.
| Current balance | Months left | Planned usage | Cap | Projected balance | Use-or-lose |
|---|---|---|---|---|---|
| 35 | 6 | 10 | 60 | 40 | 0 |
| 80 | 3 | 5 | 60 | 82.5 | 22.5 |
| 80 | 3 | 5 | 90 (SLA) | 82.5 | 0 |
One more reminder about SLA and sell-back
SLA rules and sell-back eligibility can be nuanced and service/component-specific. Use this calculator to plan conversations and schedules, but verify your cap, SLA expiration, and sell-back options with official sources before making decisions.