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Car Hire Insights

The Difference Between Collision Damage Waiver and Excess Insurance

Gigasure blog, Car driving around a bend surrounded by verdant views.
Car Hire Insights
7th May, 2025

When renting a car, especially abroad, one of the first questions you’re likely to face is whether to purchase Collision Damage Waiver (CDW). If you’ve ever felt unsure about what it covers, how it differs from other insurance options, or whether it’s worth the extra cost, you’re not alone. In this guide, we’ll demystify the concept of CDW, helping UK-based travellers make informed decisions about their car hire insurance options. 

What Is Collision Damage Waiver (CDW)? 

Collision Damage Waiver (CDW) is an optional add-on offered by car hire companies that limits your financial responsibility if the rental car is damaged. While it’s often called “insurance,” it’s technically not an insurance policy but a waiver that reduces or “waives” your liability for certain types of damage to the vehicle. 

Some car hire companies use the term “Loss Damage Waiver (LDW)” interchangeably with CDW, though LDW may also include theft protection. When you purchase CDW, the car hire company agrees to absorb most of the costs of repairing the vehicle in the event of damage. However, it’s important to note that CDW coverage varies widely between providers, and understanding what is and isn’t covered is crucial. 

What Does CDW Cover? (And What Doesn’t It Cover?) 

CDW typically covers: 

  • Accidental damage to the rental car’s exterior. 
  • Weather-related damage, such as hail or flooding (though not always). 
  • In some cases, vehicle theft or vandalism (if bundled with an LDW). 

However, CDWs come with significant exclusions. These often include: 

  • Personal liability: Any injury or property damage you cause to others while driving. 
  • Injury to passengers in the rental car. 
  • Theft of personal belongings from the vehicle. 
  • Minor damage to tyres, windscreens, or the undercarriage, unless explicitly stated in the policy. 

Many rental companies impose high excess fees—the portion of costs you’re still responsible for even with CDW. For example, if the car suffers damage and the repair cost is £2,000, you might still need to pay an excess of £500 to £1,000. Always read the rental agreement carefully to understand the terms, exclusions, and excess fees before agreeing to CDW. 

CDW vs. Car Hire Excess Insurance 

A common point of confusion for travellers is the difference between CDW and car hire excess insurance. While they both aim to reduce your financial exposure, they function differently: 

  • CDW (Collision Damage Waiver): Purchased directly from the rental company, it reduces your liability for damage to the car but often leaves you responsible for an excess amount and excludes certain types of damage. 
  • Car Hire Excess Insurance: A standalone policy, often purchased in advance from a third-party provider like Gigasure. It covers the excess left unpaid by CDW, as well as areas CDWs typically exclude, such as damage to tyres, windscreens, and the undercarriage. 

The key advantage of car hire excess insurance is its comprehensive nature and cost-effectiveness. With Gigasure, for example, you can secure robust coverage that fills gaps left by CDW—all at a fraction of the cost rental companies charge for their waivers. 

Cost Considerations: CDW vs. Alternatives 

The cost of CDW can vary widely depending on the rental company, the location, and the duration of your rental. In many cases, the daily charge for CDW ranges from £10 to £25, and these costs can quickly add up, particularly for longer rentals. 

In contrast, purchasing car hire excess insurance in advance is often significantly cheaper. For example, a week-long policy from a third-party provider like Gigasure might cost as little as £20-£40, while offering broader coverage than CDW. By planning, you can save money and gain peace of mind knowing you’re fully protected. 

Alternatives to Relying on CDW 

Before agreeing to CDW at the rental counter, consider whether you already have coverage through one of the following options: 

  • Personal Car Insurance: Some policies extend to rental vehicles, but this is rare in the UK. Check with your insurer for details. 
  • Credit Card Coverage: Certain premium credit cards offer rental car insurance benefits, though they may have limitations on location, vehicle type, and coverage scope. 
  • Standalone Car Hire Excess Insurance: A specialist policy like those offered by Gigasure can provide comprehensive protection for a fraction of the cost of CDW. 

It’s always wise to review your existing insurance policies and credit card benefits before your trip to avoid duplicating coverage or incurring unnecessary costs. 

When Is CDW Worth It? 

There are scenarios where opting for CDW might make sense, such as: 

  • You have no existing coverage: If your personal insurance or credit card benefits don’t cover rental cars, CDW provides some level of protection. 
  • Driving in unfamiliar conditions: If you’re nervous about navigating foreign roads, a CDW can offer peace of mind. 
  • Renting high-value vehicles: For luxury cars, the potential repair costs can be substantial, making CDW more appealing. 

Even in these cases, consider whether a specialist car hire excess insurance policy could provide better protection at a lower cost. 

Tips for Making an Informed Decision 

To avoid overpaying for car hire excess insurance and ensure adequate coverage, follow these tips: 

  1. Review your existing policies: Check your personal car insurance, travel insurance, or credit card perks for rental vehicle coverage. 
  2. Compare CDW costs and coverage: Look at the rental car company’s CDW terms and calculate the total cost for your rental period. 
  3. Consider specialist car hire excess insurance: Providers like Gigasure offer comprehensive and affordable coverage that can fill the gaps left by CDWs. 
  4. Read the fine print: Rental agreements can vary widely, so take the time to understand the coverage limits and exclusions of any policy you’re considering. 

By weighing your options carefully, you can make an informed decision that suits your travel needs and budget. 

In summary, Collision Damage Waiver can provide valuable protection for travellers renting cars, but it’s not always the most comprehensive or cost-effective option. By understanding what CDW covers, how it differs from car hire excess insurance, and the alternatives available, you can avoid unnecessary costs and drive with confidence. At Gigasure, we’re here to help UK travellers find the right insurance solutions, empowering you to enjoy your journey without worry. 

When it comes to car hire insurance, knowledge truly is power. So, plan, explore your options, and travel smart knowing you’ve made the best choice for your peace of mind. 

Ready to protect yourself against unexpected costs when renting a car? Learn more about Gigasure’s Car Hire Excess Insurance and enjoy your journey with peace of mind. 

More useful insights: 

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