Cutover Without Bleed: A 90-Day Fuel-Card Migration Plan for Thirty UK Vans
Photo: J. M. W. Turner, Public domain, via Wikimedia Commons
A fuel-card tender often begins with a simple comparison: one provider offers 2p per litre less than another, and the arithmetic looks persuasive. For a thirty-van UK fleet, that headline difference deserves a colder reading. Migration is not a switch on a website; it is a controlled change of payment, data and driver behaviour. The saving is real only after exit costs, card reissue, retraining and the reconciliation gap at cutover have been priced.
First, put a number on the pump saving
Take a thirty-van fleet averaging 9,000 miles a year at 32 mpg. That is roughly 38,000 litres of diesel annually. A 2p per litre saving is about £760 a year before VAT. At 4p it is roughly £1,520; at 6p it is roughly £2,280. Those are useful figures, but they are annual gross savings, not first-year cash. A migration can easily consume a year of a 2p saving in administrative time alone.
The correct comparison is net saving over the contract term, not the rate on the first statement. If a provider asks for a 24-month term, compare two years of pump saving with the full one-off migration cost and any lost rebate, float or site coverage.
The 90-day sequence
A thirty-van fleet does not need a programme office, but it does need a sequence. The following 90-day plan keeps the old and new systems from overlapping for longer than necessary.
Days 1 to 15: establish the exit position. Read the current agreement for notice periods, early termination charges, card return obligations and outstanding float. Export at least twelve months of transaction data in a usable format. List every card, driver, vehicle, PIN status and cost centre. Identify fuel types and any unusual sites, such as bunkered fuel or unattended forecourts.
Days 16 to 35: select and map. Confirm site coverage on the routes that matter, not just the national count. Check whether the new provider can replicate cost-centre reporting, mileage capture and exception alerts. Map each driver to a vehicle and a cost centre before any card is produced. Decide the PIN policy and who holds the administrator role.
Days 36 to 55: build the controls. Set transaction limits, fuel-type restrictions and weekend-use rules. Agree the reconciliation format with finance. If telematics is used, confirm how odometer and location data will be matched to fuel transactions. Build a manual fallback for the cutover week, because the first statements will not be clean.
Days 56 to 70: pilot with six vans. Use a representative mix: high-mileage, low-mileage, one pool van and one vehicle with an unusual route. Run the pilot long enough to see at least two statement cycles or one full reconciliation. Do not issue all thirty cards on day one.
Days 71 to 85: cut over and close the old account. Deactivate old cards in batches, not all at once. Collect and destroy returned cards. Keep a named person responsible for chasing missing cards. Obtain final statements and close the old float.
Days 86 to 90: reconcile and review. Match the final old-card transactions to the new ledger. Confirm that no driver is holding two live cards. Review exception reports and correct cost-centre errors before the first full month closes.
A costed checklist for thirty vans
The figures below are indicative planning figures for a thirty-van fleet, using internal admin time at £35 per hour and driver time at £22 per hour. They are not quotations, but they show the scale.
| Migration item | Indicative cost | Note |
|---|---|---|
| Contract and exit review | £300 to £500 | Eight to twelve admin hours |
| Data export and ledger rebuild | £400 to £700 | Twelve to twenty hours |
| Card reissue, thirty to forty cards | £0 to £200 | Many providers waive or cap this |
| Driver communication and training | £500 to £800 | One hour for thirty drivers plus materials |
| Pilot and cutover reconciliation | £700 to £1,100 | Twenty to thirty admin hours |
| Temporary manual controls | £300 to £600 | Cutover-week checks and chasing |
| Indicative total | £2,200 to £3,900 | Before lost rebate or float timing |
Against a 2p saving of about £760 a year, that is a payback of three to five years before any sign-on credit or improved control benefit. Against 4p, payback is closer to two years. The point is not that migration is always wrong. It is that the pence-per-litre rate must clear the migration invoice before it is treated as a saving.
Where the cutover ledger leaks
The most common failure is not fraud. It is timing. Old-card transactions settle after the old account is closed; new-card transactions arrive before cost centres are correct. For a period of two to four weeks, the fleet can hold two incomplete ledgers. If finance closes the month during that window, the fuel line is either overstated or understated.
A second leak is the returned card. Cards posted to a depot address can sit in a drawer. A card that is not deactivated remains a control risk even if it is never used. Keep a card register with a status for every card: issued, active, returned, destroyed. Reconcile it weekly during cutover.
A third leak is driver habit. A driver who has used the same forecourt for years may continue to use the old card until it is declined. Communicate the cutover date more than once, and make the new card visible before the old one stops working.
The decision rule for 2026
For a thirty-van fleet, treat a fuel-card switch as a project with a budget, not a purchasing decision with a rate. Add the indicative migration cost to any lost rebate and the value of management time. Compare that total with the net pump saving over the contract term. If the saving does not clear the cost with a margin for control risk, negotiate a sign-on credit, a shorter term or a staged migration. If it does, run the 90-day plan and keep the reconciliation tight. The cheapest card is not always the cheapest switch.
