How to move from Excel to rental software without losing a single booking

Flotly Team - published 22 April 2026, updated 18 September 2026 · 6 min read

The spreadsheet has done the job for years. But every season, you lose hours patching things back together. Here is the method for switching to a proper tool without losing a single booking.

If you manage your fleet in a spreadsheet, you know the scene: a customer calls to book, you open the file, and you hope no colleague is editing the same row. With 5 vehicles, it works. With 20, it becomes unmanageable.

Migrating looks daunting. In practice, with a platform built for it, it is a series of short steps that don’t interrupt your business. How long each one takes depends on the size and tidiness of your file: measure your own. Here is the method.

Step 1: prepare a clean export

You don’t need a perfect structure. The goal is simply to have your data in one usable file. Three Excel sheets are enough: vehicles, customers, current bookings.

• Vehicles: make, model, year, registration number, mileage, daily rate
• Customers: last name, first name, email, phone, driving licence (if you have it)
• Current bookings: vehicle, customer, dates, amount

Don’t worry about the format: the import wizard suggests a column mapping (start_date / pickup_date / departure, and so on) that you check and correct before confirming.

Step 2: import into Flotly

From the dashboard, the import wizard accepts CSV, XLSX or JSON. You drop in your file, map the columns and confirm. If a registration number or a VIN is entered, the NHTSA decoder automatically enriches the vehicle records.

At the end, you get a summary: X vehicles imported, Y customers, Z bookings. Any duplicates are flagged, not silently overwritten.

Step 3: set up your rates and rules

Your daily rates are imported. To go further, you write your own rules: weekend surcharge, long-rental discounts, rates by vehicle category or by customer profile. The engine applies the rule you defined, deterministically: it doesn’t guess an optimal price on your behalf.

Step 4: connect Stripe and go live

You connect your Stripe account from the settings. Pre-authorised security deposits, payouts on Stripe’s payout schedule. No technical integration is required: card data never passes through Flotly, and PCI compliance sits with Stripe.

Your booking catalogue is now public, under your own domain name if you have set one up. You can take your first online bookings right away.

Step 5: run both in parallel for a few days (safety net)

For the first few days, keep your spreadsheet read-only as a safety net. Check that your first bookings go through correctly, that your PDF agreements are right and that your payments arrive. Then archive the spreadsheet and move on.

Measuring your return on investment

We don’t publish an average gain: we don’t have a large enough sample of rental companies for such a figure to be anything other than a guess dressed up as data. What you can do, however, is measure your own.

Record two indicators in the week before the migration, then four weeks after: the time spent on admin (to the nearest half hour is enough) and the number of incoming bookings per channel (phone, messaging, online catalogue). The difference between the two readings is your real return on investment.

A common bias: if you migrate at the start of peak season, the rise in bookings comes from the calendar first, not from the tool. Compare periods with equivalent seasonality, or postpone the comparison to the same period the following year.