Collecting the hire car is not the end of the process. The days between pick-up and return are when small decisions about fuel, parking, warning lights, tolls, extra drivers, route changes and damage can affect the final bill.
The mistake is treating the car exactly like your own. A hire car comes with supplier procedures: who can drive, where the vehicle can go, what to do if a warning light appears, how to report damage, and which proof to keep until the deposit is released.
The key is to keep the rental under control without overcomplicating the trip. You do not need to document every minute, but you do need to act early when something changes and keep evidence for anything that could later become a charge, especially if the deposit has not yet been released fully.
On gocarhire.co.uk, this guide explains what to do during your car hire, from the first drive to the final day, so you can avoid preventable costs and handle problems in the right order.
At a glance: what to do during your car hire
- Check the car during the first drive: warning lights, fuel level, tyres, controls and unusual noises should be dealt with early.
- Use the car within the agreement: only authorised drivers should drive, and restricted routes or countries need permission.
- Keep practical proof: save fuel, toll and parking receipts, and photograph anything unusual.
- Report problems promptly: contact the supplier before arranging repairs, changing plans or continuing with a possible fault.
- Plan the return before the last hour: fuel, cleaning, belongings, accessories and inspection are easier when you are not rushing.
The first drive: check that everything feels right
Even if you inspected the vehicle at pick-up, the first few minutes on the road are important. Some issues only become obvious once the car is moving: dashboard warnings, low tyre pressure, unusual noises, poor visibility, faulty wipers, weak lights or controls you do not understand.
If something feels wrong, stop safely and contact the supplier before continuing. If you are still close to the pick-up branch, it may be easier to return immediately and ask for the issue to be checked or recorded.
Practical tip: take a photo of any dashboard warning and send or show it to the supplier. A timestamped photo is more useful than trying to describe the light later.
Keep the rental agreement easy to reach
During the hire, keep the rental agreement, booking voucher, supplier contact details and roadside assistance number somewhere accessible. If there is a breakdown, accident, warning light, toll issue or return change, you should not need to search through luggage or old emails.
It is also useful to save key details offline: return address, opening hours, fuel policy, mileage allowance, authorised drivers and emergency contacts. This is especially important on rural routes, abroad, or when mobile signal is unreliable.
Fuel: use the right type and keep receipts
Wrong fuel is one of the most expensive mistakes during a hire. Before refuelling, check the fuel type on the fuel flap, dashboard, rental agreement or key tag. If you are unsure, contact the supplier before filling the tank.
Also keep fuel receipts, especially if the car has a full-to-full or same-to-same fuel policy. A receipt close to the return location can help if the supplier later questions the fuel level.
| Fuel situation | What to do | Why it matters |
|---|---|---|
| Unsure whether petrol, diesel or electric | Do not refuel until you have checked the vehicle or contacted the supplier. | Wrong fuel can cause serious damage and may be charged to you. |
| Full-to-full policy | Refill before return and keep the receipt. | Helps avoid or challenge fuel charges. |
| Electric vehicle | Check charging level, charging cards/apps and return requirement. | Charging rules can affect cost and return conditions. |
Tolls, parking and traffic fines
Tolls, parking charges and traffic fines can arrive after the vehicle has been returned. The supplier may receive the notice first and then charge an administration fee for handling it. This is why it is worth keeping a simple record of where you drove and what you paid.
If the vehicle has a toll device or plate-based toll billing, check how it works before using toll roads, bridges, tunnels or express lanes. If you pay for parking or tolls directly, keep the receipt or confirmation.
If a fine or toll notice arrives later, compare the date, time and location with your route before responding. Do not ignore supplier emails about fines, tolls or administration fees.
Optional equipment: GPS, child seats and accessories
If you hired optional equipment, check it during the trip and return it with the car. This includes GPS units, child seats, Wi-Fi devices, charging cables, snow chains, roof equipment or any other accessory listed on the rental agreement.
Child seats and booster seats should be fitted correctly before every journey. GPS or phone navigation should be fixed safely and should not block the driver's view. Do not hold a phone while driving or adjust devices in a way that distracts the driver.
Before return, gather accessories together and check that no removable part has been left in the hotel, boot, seat pocket or airport trolley.
Only authorised drivers should drive
During a long trip, it can be tempting to let another person drive for a short stretch. Do not do this unless they are listed as an authorised driver on the rental agreement. If there is an accident, damage, fine or insurance issue, unauthorised driving can create serious problems.
If plans change and another person needs to drive, contact the supplier and ask whether they can be added officially. The additional driver may need to present a driving licence, ID and sometimes be present at the branch.
Do not use the car outside the supplier conditions
Supplier conditions usually restrict how and where the vehicle can be used. Common restrictions can include off-road driving, towing, racing, driving under the influence, unauthorised cross-border travel, ferry or island use, certain road types, or use by unapproved drivers.
If your route changes during the hire, check before acting. Extending the hire, returning to a different location, crossing a border or taking the car onto a ferry may be possible, but it needs to be authorised and priced correctly.
Important: Premium Insurance or extra cover does not make prohibited use acceptable and does not automatically remove the supplier's deposit or card rules.
If your plans change during the hire
Small changes during a trip can become expensive if they are not agreed with the supplier. Returning late, extending the hire, changing branch, adding a driver, crossing a border, taking a ferry or keeping the car overnight in a different place may all affect the agreement.
Contact the supplier before changing the plan. Ask for the total extra cost, whether the change affects insurance or roadside assistance, and whether you need written confirmation. If the supplier approves the change, keep the email, message or updated rental agreement until the final charge and deposit release are complete.
| Change | What to confirm |
|---|---|
| Late return or extension | New return time, extra day charge, grace period and opening hours. |
| Different return branch | One-way fee, address, key-drop rules and whether the supplier has approved it. |
| Route or country change | Permission, cross-border fees, assistance cover and any restricted countries or roads. |
Warning lights, breakdowns, damage and accidents
If a warning light appears, the car behaves unusually, or you notice new damage, do not wait until return to mention it. Stop safely where appropriate, take photos, note the time and location, and contact the supplier or roadside assistance number shown in the rental documents.
Do not arrange repairs yourself unless the supplier authorises it. If there is an accident, prioritise safety first, follow local legal requirements, collect evidence and contact the supplier as soon as possible.
| Problem | First action | Proof to keep |
|---|---|---|
| Warning light | Stop safely if needed and contact the supplier. | Dashboard photo, time, location and supplier response. |
| Breakdown | Use the roadside assistance process in the rental documents. | Call reference, messages, photos and recovery documents. |
| Accident or damage | Make people safe, follow local rules and contact the supplier. | Photos, reports, witness details and supplier instructions. |
For accidents, the detailed sequence in the car hire accident guide is especially useful because evidence, reports and supplier instructions can affect the excess claim later.
Keep a simple evidence trail
You do not need to document every minute of the hire, but you should keep proof for anything that could become a charge. Fuel receipts, parking receipts, toll confirmations, supplier messages and photos of unusual issues are all useful.
This is especially helpful for out-of-hours return, disputed fuel level, minor damage, warning lights, roadside assistance calls, toll notices or traffic fines. A short note with date, time and location can make a later query much easier to answer.
Practical rule: if something could cost money later, keep proof now.
Prepare for return during the final day
Return preparation should start before the final hour. Check the return address, opening hours, fuel station options, key-drop rules and route back to the branch. If plans have changed, confirm whether the return time or location still matches the agreement.
Remove rubbish, collect personal items, gather optional accessories and leave enough time for fuel and inspection. If an out-of-hours return is still suitable, take photos of the vehicle, fuel level, mileage and parking position.
The returning a hire car checklist is the right place to handle the final inspection in more detail, including photos, fuel level, mileage and key return.
During-hire checklist
First drive
- check warning lights, mirrors, lights, tyres, wipers and controls;
- confirm fuel level, mileage and fuel type;
- report any missed damage or fault immediately;
- keep the rental agreement and assistance number accessible.
During the rental
- use only authorised drivers;
- stay within allowed routes, countries and vehicle use;
- keep fuel, toll, parking and supplier communication records;
- report warning lights, breakdowns, accidents or new damage promptly;
- do not arrange repairs unless the supplier authorises them.
Before return
- check return address, opening hours and key-drop rules;
- refuel or recharge according to the policy;
- remove rubbish and personal belongings;
- return all accessories supplied with the car;
- photograph fuel, mileage and vehicle condition if needed.
Conclusion: manage the hire while it is still happening
The best time to solve a car hire problem is during the hire, not after the vehicle has been returned. Warning lights, wrong fuel doubts, toll issues, damage, route changes and return questions are easier to handle when you contact the supplier early and keep proof.
Use gocarhire.co.uk to compare offers before booking, then keep the rental agreement, supplier conditions and practical evidence close throughout the trip. That simple habit can prevent many avoidable charges.
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