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What's the difference between a vanishing deductible and accident forgiveness?

I've got Liberty Mutual and it kinda seems like they do the same thing. Do I need both? I have a new teen driver (17-year-old son) and we want to maintain the vehicle we're going to let him use. Our agent recommended it, but I can't tell if he's just trying to rack up his commission.

Mar 19, 2026 Portland, Oregon

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Ava Lynch
Director of Insurance Content

Ava joined The Zebra in 2016 as a licensed insurance agent and writer. She now serves as director of insurance content, leading coverage strategy and…

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  • 9+ years of Experience in the Insurance Industry

Liberty Mutual does offer accident forgiveness as an add-on in most states. The idea is simple: your first at-fault accident won’t cause your premium to increase. With a 17-year-old on the policy, that protection can be useful, since young drivers are statistically more likely to be involved in fender benders or minor accidents.

That said, it’s not mandatory — plenty of families skip it. Without it, your rate would go up after an at-fault accident, usually for three to five years. With it, you’re paying a little more upfront to avoid that surprise hike later.

Your agent isn’t wrong to recommend it, but whether it’s worth it depends on your comfort level and budget. If steady premiums give you peace of mind, it can be a good safety net. If you’d rather keep your bill lower now and take your chances, you might decide it’s not necessary.

If you want to check out other options for families with teen drivers, we can help you out. Give our agents a call or start comparing quotes online in minutes.

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