A small car rental business should set its daily rate from the yearly cost of each car divided by the number of days it will really be rented, plus a margin on top. Fleet utilization decides how many days that is, so it moves the rate more than any other number. The damage excess decides who pays when a car comes back with a dent: the customer, your insurer or you. Get the three right together and every rental pays its share of the car.
This guide works through one example car with three free calculators, so you can repeat it with your own figures. All figures below are example values, not market data.
Step 1: Find the break-even daily rate
A rental car costs money every day of the year, whether it is out or parked. The daily rental rate calculator adds up those yearly costs and spreads them over the days you expect to rent the car.
- Vehicle purchase price. The tool writes this amount off evenly over the years you enter and does not ask for a resale value. If you plan to sell the car at the end, enter the purchase price minus the expected sale price.
- Years of ownership. How long the car stays in your fleet.
- Insurance and tax per year.
- Maintenance per year. Tyres, servicing, cleaning, loan interest and any other running cost per car belong here; the tool has no separate field for them.
- Expected rental days per year. Be honest. This is the number that matters most.
- Profit margin. The tool adds this percentage on top of your cost. That is a markup, not a margin on the selling price. If the difference is new to you, read profit margin vs markup.
Worked example
A compact car costs €22,000. You plan to keep it four years and expect to sell it for €8,000, so you enter €14,000. Insurance and tax are €1,800 a year, maintenance and cleaning €1,100, and you expect 180 rental days. You want 30% on top of cost.
| Calculation | Tool result | |
|---|---|---|
| Write-off per year | €14,000 ÷ 4 | €3,500 |
| Total cost per year | €3,500 + €1,800 + €1,100 | €6,400 |
| Break-even daily rate | €6,400 ÷ 180 | €36 |
| Recommended daily rate | €35.56 × 1.30 | €46 |
| Annual profit at this rate | €46.22 × 180 − €6,400 | €1,920 |
Below €36 a day, this car loses money. At €46, it earns €1,920 a year, but only if it really goes out on 180 days.
Step 2: Check how many days your cars really earn
The rental days in step 1 are a guess. Fleet utilization tells you whether the guess holds. The fleet utilization calculator divides the days your cars were actually rented by the days they could have been rented.
- Enter the number of cars.
- Enter the available days per car per year, after servicing and repairs.
- Enter the total billable days of the whole fleet last year, from your booking records.
- Enter your average daily rate.
Worked example
You run eight cars, each available 330 days a year, and your records show 1,560 billable days last year at an average of €46.
| Calculation | Tool result | |
|---|---|---|
| Available days | 8 × 330 | 2,640 |
| Utilization | 1,560 ÷ 2,640 | 59.1% |
| Idle days | 2,640 − 1,560 | 1,080 |
| Lost revenue | 1,080 × €46 | €49,680 |
Read the lost revenue as a ceiling, not a target. It assumes every idle day could have been sold at the full rate, and a quiet Tuesday in February rarely can. What it does show is the size of the opportunity.
The more useful number is hidden in the table: 1,560 days across eight cars is 195 days per car. Enter 195 instead of 180 in the daily rate calculator, keep everything else, and the break-even rate drops to €33 and the recommended rate to €43.
Why utilization moves the rate so much
The yearly cost of the car stays the same whatever you do; only the number of days you can spread it over changes. With the example car:
| Rental days per year | Break-even rate | Recommended rate |
|---|---|---|
| 120 | €53 | €69 |
| 180 | €36 | €46 |
| 195 | €33 | €43 |
| 240 | €27 | €35 |
The tool shows the same €1,920 profit on every row, because it assumes you reach the days you entered. Reality is less kind. If you charge €46 and the car goes out on only 120 days, it brings in €5,520 against €6,400 of cost, a loss of €880. That is why a realistic day count matters more than a polished margin.
Step 3: Decide how damage is split
Damage is the cost that can wipe out a good year. The damage excess calculator splits one repair between three parties.
- Enter the total damage cost from the quote.
- Enter the customer excess from your rental contract.
- Enter your admin or handling fee.
Worked example
A car comes back with a damaged bumper and door. The repair quote is €1,400, the contract excess is €900 and your admin fee is €60.
| Calculation | Tool result | |
|---|---|---|
| Customer pays | €900 + €60 | €960 |
| Insurance covers | €1,400 − €900 | €500 |
| Company absorbs | €0 |
A scratch for €350 sits below the excess: the customer pays €350 plus the €60 fee, €410 in total, and insurance is not involved.
The gap the calculator does not show
The calculator assumes your insurer pays everything above the customer excess, so "Company absorbs" stays at €0. Check your own fleet policy. If it has its own deductible per claim and that deductible is higher than the customer excess, the difference is yours.
Example: your policy deductible is €1,500. On the €1,400 repair your insurer pays nothing. The customer covers €900 of the repair, and the remaining €500 comes out of your pocket. The €60 admin fee pays for your time handling the claim; it is not profit.
Two ways to deal with that gap:
- Close it in the contract. Set the customer excess no lower than your own policy deductible, and state it clearly at signing.
- Price it in. Estimate what you absorb per car per year and add it to the maintenance field. If the example car absorbs €500 a year, maintenance becomes €1,600, and at 180 days the recommended rate rises from €46 to €50.
A lower excess can win bookings, but every euro you take off it is a euro you may carry yourself.
Buy or lease the next car?
The write-off in step 1 is usually the biggest single cost, so the way you finance a car changes the rate. The car lease vs buy calculator compares the total cost of buying (down payment, loan and resale value) with leasing (upfront fee and monthly payments) over the same period. If you lease, check that the contract allows the car to be rented to third parties.
The resale value also feeds straight into your daily rate: a car that sells well at the end of its rental life costs less per day. If you sell retired cars yourself, Vehicle Hub, the vehicle stock app in KIMISUITE, lists each car on your own website with its own page.
A short routine for your rates
- Recalculate the rate for each car group once a year, with last year's real rental days
- Compare your customer excess with your own policy deductible
- Add absorbed damage to the yearly cost of the car
FAQ
Should high season and low season have different rates?
Yes, as long as they average out to the yearly target. In the example, 180 days at the recommended rate must bring in €8,320 (€6,400 cost plus 30%). If you rent 100 summer days at €56, that is €5,600, so the remaining 80 days need €2,720, or €34 a day.
What utilization should a small rental fleet aim for?
There is no single right figure; it depends on your season and your market. What matters is that the rental days in your rate calculation match the days you really achieve. A fleet that is booked almost every day leaves no room for servicing, repairs or last-minute customers.
Is the admin fee on a damage claim extra profit?
No. It covers the time spent on photos, quotes, insurer contact and customer calls. Disclose it in the contract at signing, so it is not a surprise at hand-back.
