Getting a tag fitted to your car could reduce the cost of tolls – we explain how it works.

What are tags?

Tags are small electronic devices which attach to your windscreen and are scanned when you pass a toll booth. Your bank account is charged with a reduced fee – and you won’t have to stop and pay by cash.

Each toll road requires its own tag – but check first, as not all tolls have a scheme – especially private road tolls, where the owner can set their own charges.

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Dartford-Thurrock Crossing

Cost now: £1.50
What it was: £1
Discount: 50p

This toll will rise from £1 to £1.50 on November 15. Here are some easy ways to save:

• Get a Dart Tag for free and save 50p each time you take the crossing – just remember to top up your Dart account regularly
• Cross the toll road between 10pm and 6am and you won’t have to pay
• Join the local residents scheme if you live nearby – you’ll get 50 free journeys per year for a £10 annual fee

Other tolls

M6 Toll Road

Cost: £4.50
Discount: 25p

Get a five per cent discount with an M6 tag, which costs £1 per month.

London Congestion Charge

Cost: £8
Discount: £8

Drive an alternative-fuel vehicle – one which runs on electricity, biodiesel, bioethanol or hydrogen – and you won’t have to pay a thing.

For more information read our complete guide to the London congestion charge.

Severn River Crossing

Cost: £5.30
Discount: Up to £200 per month

Apply for a fixed £93.28 monthly season tag and you can cross the toll bridge as many times as you like.

Disabled blue badge holders

Registered blue badge holders are exempt from all the above fees.

You must apply for a Mobility Exemption Pass to cross the M6 for free, but only if you’re exempt from road tax and if you’re on the higher rate disability living allowance.

For more information visit the Government’s blue badge advice page.

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Disclaimer: Auto Trader cannot guarantee the above advice will always save you money.