Overtime & Callback Pay.
Most firefighters earn 20–40% of their gross income through structured overtime: callbacks, mandatory hold-overs, holiday pay, acting-officer differentials. Underwriters are required to evaluate this income for likelihood of continuance. The default approach: ask for two years of W-2s, average the OT, call it done.
That approach screws firefighters in three common cases:
- Strong recent year, weak prior year. If you had a slow OT year two years ago and a heavy one last year, the two-year average drags your qualifying income down by thousands. We fight for use of the most recent 12 months only when the upward trend is documented and consistent.
- Department-mandated OT. Some agencies (Miami-Dade, FDNY, LAFD, many large municipal departments) have mandatory minimum overtime built into the schedule. That income is essentially base pay — we push for it to be treated that way, not as variable.
- Probationary year skipped. Some departments restrict OT during your probationary year. Underwriters who don’t understand this average a low first-year against a normal second-year and tank your income. We document the probation period and exclude that month range from averaging.
The 24/48 Schedule.
Most municipal firefighters work a 24-on / 48-off (or 24/72, or 48/96) schedule. Your hours per week, calculated on the standard mortgage formula of hours × 4.33 weeks × hourly rate, often comes out to 56 hours/week (a third of the year on duty). The underwriter then questions where the extra income comes from versus a standard 40-hour worker.
The answer is that the 56-hour week IS the base — your contract guarantees it. Some lenders accept the schedule’s documented hours per pay period at face value (the right answer). Others want overtime methodology applied to the hours above 40 (the wrong answer for shift-based fire schedules). The lender selection on the front end determines which interpretation underwriting uses. We know which lenders use which method, by name.
DROP & Pension Income.
Drop in (Deferred Retirement Option Plan) firefighters are eligible to retire but choose to keep working — accruing pension benefits in a side account while earning their active salary. For mortgage purposes, DROP creates a documentation puzzle:
- Your active firefighter income still applies — that’s the easy part.
- Your future pension can sometimes be used as an additional income stream when buying a second home or retirement house — but only with the right lender and documentation.
- If you’re fully retired and pension-only, the gross-up rules vary by lender (some allow 125% of net for non-taxable pension; some don’t).
We model the file three ways and pick the lender that gives you the strongest qualification.
Probationary Status.
Most departments treat your first 12–18 months as probationary. Many lenders won’t use probationary income at all — they want the probation period to end before they’ll qualify the file. That’s overly conservative, and unnecessarily strict.
The actual rule (Fannie Mae B3-3.1-01, Freddie 5302.5): probationary income can be used if there’s a stable history of employment in a similar capacity (training academy, EMT work, prior service in another department) AND a written statement from your department confirming the probation is procedural, not performance-conditional. We assemble that documentation routinely. Most retail loan officers don’t.
Department Pay Differentials.
Paramedic certification stipend. Hazmat differential. Special-team pay (technical rescue, dive team, USAR). Acting-officer pay. Bilingual pay. Each of these counts as income — but only if documented for likely continuance.
We map every pay line on your W-2 to the underwriting category that maximizes its use. That documentation discipline alone is usually worth $40,000–$80,000 of additional qualifying purchase power versus a generic submission.