SixT online promo codes in 2026

How do I apply SixT promo codes to my online order?

What is SIXT's cancellation fee for a prepaid booking?

If you cancel a prepaid SIXT booking before the scheduled pick‑up, there’s a cancellation fee of £99 inclusive of tax. That fee will never be more than the total amount you prepaid. If you cancel after the scheduled pick‑up time, SIXT will charge the full reservation amount. This applies to standard consumer bookings unless your corporate account has different terms.

Will SIXT charge the full amount if the vehicle is not collected?

If you don’t cancel a prepaid reservation before the rental start time and then don’t collect the vehicle, SIXT will charge the full rental amount. The same full‑charge rule applies to cancellations made after the scheduled pick‑up time. So, top tip: cancel before the start time to avoid the full charge. Corporate customers with their own agreements may have different terms.

Are pay‑on‑arrival bookings refundable if cancelled before pick‑up?

Pay‑on‑arrival bookings can be cancelled before pick‑up without charge, depending on the tariff you picked when booking. SIXT states that pay‑on‑arrival cancellations before the scheduled pick‑up are usually FREE of charge, but always check your booking confirmation to be sure your tariff is pay‑on‑arrival. Prepaid tariffs follow the prepaid cancellation rules instead.

Does SIXT charge a fee to change a reservation and how are price differences handled?

SIXT doesn’t charge an extra rebooking fee if your change increases the tariff - you just pay the difference. If you chose a pay‑later option, you can make changes at any time with no amendment fee. To change online you’ll need the security code from your confirmation email, or you can contact customer services for help. If a change reduces the price, it’ll be handled according to the original payment and tariff conditions.

What is meant by SIXT's "pay later" and "pre‑pay" options and how do prices compare?

SIXT offers pay‑later and pre‑pay tariffs. Pre‑pay bookings are typically cheaper at the point of booking but require payment in advance and may carry fees for cancelling or amending. Pay‑later gives you more flexibility to change without a rebooking fee, depending on the tariff terms. Compare the total price and cancellation conditions before you pick a payment option.

Which payment methods does SIXT accept in the UK?

SIXT accepts major credit and debit cards in the UK, including Visa, Mastercard, American Express and Diners Club. PayPal is accepted for prepaid bookings. Cash is not accepted at any SIXT branch in the UK. The cardholder used to pay must be the main driver named on the rental agreement unless corporate arrangements say otherwise.

Are there any payment types that SIXT will not accept?

SIXT doesn’t accept cash, Visa Electron debit cards or prepaid cards such as prepaid Mastercards at UK branches. International debit cards are accepted, but the cardholder must be the main driver when paying. Company credit cards are only accepted if the card shows the name of the renter collecting the vehicle. Check payment terms for any location‑specific restrictions.

How much does the London Congestion Charge cost and who must pay it?

The London Congestion Charge is £15 per day if paid in advance or on the same day, according to SIXT guidance. If you pay by midnight of the third charging day after travel, the charge is £17.50. SIXT says it’s the driver’s responsibility to register and pay the Congestion Charge for each day the vehicle is driven in the zone - failure to pay on time may lead to a Penalty Charge Notice issued to the driver.

Does SIXT provide parking for customers at Heathrow branches?

SIXT notes that some Heathrow branches have no customer parking and that any airport parking or drop‑off fees must be paid directly to the airport. Temporary drop‑off parking for short visits may be managed and charged by the airport. When returning a vehicle, follow the branch return instructions rather than assuming FREE parking is available. Local branch pages will state the exact parking arrangements where applicable.

Can a customer add additional drivers and how is this charged?

You can add additional drivers to the rental agreement, but an additional driver fee will apply and is added to the booking price. The exact charge varies by location and rental length, and some vehicle groups already include an extra driver in the price. All additional drivers must be present at pick‑up, show a valid driving licence, and meet age requirements for the vehicle category. Not registering extra drivers can void cover under the rental agreement.

Are child seats available from SIXT and what types are offered?

SIXT provides child and baby seats for different age groups, including baby seats (0–13kg), child seats (9–18kg) and booster seats (15–36kg). Seats are checked regularly for quality and include side impact protection where applicable. The site confirms tested seat availability but doesn’t publish a standard price on general help pages, so add the item during booking to see the exact cost. Product descriptions note placement and airbag considerations for front‑seat use.

What administrative charge will SIXT apply when processing fines or penalties?

SIXT charges an administration fee of £40.00 for each traffic‑violation transaction it handles on your behalf. You’ll still be liable for the original fine or penalty amount issued by the authority. This processing charge is listed in the rental information and applies when SIXT handles unpaid tolls, parking fines or other penalties from the rental period.

Does SIXT include Loss Damage Waiver (LDW) in UK rates?

SIXT includes Loss Damage Waiver (LDW) in its UK rates as standard, which reduces your responsibility for loss or damage to the vehicle subject to an excess. The exact excess depends on the vehicle class and any protection options you choose. Optional products can reduce or remove the excess further - check the rental agreement and protection information at booking to understand potential liabilities.

Is there a surcharge for young drivers at SIXT?

Drivers under 28 must pay a Young Driver Surcharge according to SIXT’s UK protection information. The exact surcharge is shown on the rental information page and varies by vehicle group and location. Age and licence‑tenure rules also affect eligibility for certain vehicle categories, so check the quoted price at booking for the specific young driver surcharge that applies to you.

What are the SIXT+ mileage processing fees if subscribers forget to transmit miles?

If SIXT+ subscribers don’t transmit mileage, an initial processing fee of £9.99 will be charged. If they continue to miss transmissions, the fee rises to £19.99 per month from the second month. This fee structure applies to SIXT+ car subscription customers and is separate from standard rental charges - so remember to transmit mileage via the SIXT app to avoid these processing fees.