Fleet Replacement Timing Calculator — When to Replace Your Trucks
Calculate the optimal timing to replace trucks in your fleet. Balance rising maintenance costs against declining asset value — find the crossover point where a new truck is cheaper than keeping the old one.
🔄 Fleet Replacement Timing Calculator
How to Use This Calculator
- Enter current truck's maintenance and downtime — use last 12 months actual data for most accurate results.
- Enter new truck payment — get a dealer finance quote for the replacement truck you're considering.
- Decision rule — replace when annual maintenance + downtime cost exceeds the annualised cost difference between new and current truck.
Worked Example
7-year-old truck, $28K maintenance, 18 downtime days, $1,400 revenue/day, $2,800/month new truck payment, $6K new maintenance.
- Annual keep cost: $28K + $25.2K downtime = $53,200
- New truck payments: $33,600/yr
- Maintenance saving: $22,000
- Downtime saving (70%): $17,640
- Annual benefit of replacing: $39,640 > $33,600 payments
Replacement is justified. The savings exceed the payment cost — and the calculation doesn't include the risk reduction from a more reliable truck in your revenue operations.
Frequently Asked Questions
There's no single answer — it depends on maintenance cost escalation, not mileage. Some well-maintained trucks run 1 million miles economically. Others need engine rebuilds at 500K miles that cost $25,000+. Use actual maintenance records: if 12-month maintenance cost is approaching 40–50% of annual truck payments for a new equivalent, replacement is worth analysing.
Yes — a truck traded in now at $35,000 is worth more than the same truck a year from now (likely $25,000–$30,000 after another year of age and miles). The longer you wait to replace, the less you get for your trade-in. Include trade-in value decline in your replacement timing analysis.