Calculate the pro-rata starting point
Divide contracted weekly hours by the full-time hours used for the post, then multiply the annual basic salary by that fraction. Our calculator uses 42 hours as the national firefighter reference but your contract remains decisive.
Add only genuine recurring pay
Local additions may also be pro-rated, paid in full or linked to duties actually performed. Overtime triggers can depend on when contracted hours or full-time thresholds are exceeded. Ask HR for a written illustration.
Compare the whole package
A flexible arrangement affects working dates, leave, pension build-up and availability for additional duties as well as monthly net pay. Compare annual outcomes, not a single normal month.
Frequently asked questions
Is a part-time firefighter the same as an on-call firefighter?
No. Part-time describes contracted hours; on-call work uses an availability and activity pay structure.
Are pension contributions based on actual pay?
Current scheme treatment should be checked with the administrator. The 2026 English contribution structure uses actual pensionable earnings.