A higher deductible (excess in the UK) lowers your premium but means you pay more out of pocket when you claim. A $500→$1,000 increase typically saves $15–$35 per month — that's $180–$420 per year. The break-even calculation is simple: divide the extra deductible by the annual saving. If raising from $500 to $1,000 saves $25/month ($300/year), you break even after 1.7 years ($500 ÷ $300). Only choose the higher deductible if you can comfortably cover that amount from savings and you don't expect to claim frequently.
True Motion Auto collects and presents information from official and primary sources (regulators, government bodies, lenders and insurers' published terms). This is general information, not personalised financial advice — check figures with the provider or a qualified adviser before acting. Jurisdiction: General — check your jurisdiction. Last checked: August 2026.
Editorial oversight: Vasudha Gupta, Editor.
High vs. low deductible at a glance
| Factor | Low deductible ($250–$500) | High deductible ($1,000–$2,000) |
|---|---|---|
| Monthly premium | Higher | Lower |
| Out-of-pocket at claim time | Less | More |
| Best for | Tight emergency fund; newer drivers | Solid savings; clean driving history |
| Risk profile | Frequent claims, high-risk area | Low-mileage, safe driver, low-risk area |
| Typical US saving ($500→$1,000) | N/A | $15–$35/month (~$180–$420/yr) |
What a deductible actually does
When you make a claim for collision or comprehensive damage, the deductible is the portion you pay first — the insurer covers the rest. A $500 deductible on a $3,000 repair means you pay $500 and your insurer pays $2,500. In the UK, the equivalent is called the excess; it works identically, though it's often split into a compulsory excess (set by the insurer) and a voluntary excess (chosen by you). Only the voluntary portion is negotiable.
Deductibles/excess only apply to collision and comprehensive claims. Liability claims (damage you cause to others) have no deductible — the insurer pays the full amount.
The break-even calculation
This is the only maths you need. Take the difference between two deductible options and divide by the annual premium saving.
Example: Moving from a $500 to a $1,000 deductible saves $28/month ($336/year). You're taking on an extra $500 of risk. $500 ÷ $336 = 1.49 years. If you don't file a claim within 18 months, you're ahead. Given that the average US driver files a collision claim roughly once every 10 years, the higher deductible wins financially over time — provided you can cover the $1,000.
When a low deductible makes sense
- Your emergency fund is under $1,000 — you can't absorb a large out-of-pocket expense without going into debt.
- You live or park in a high-risk area (theft, vandalism, weather events) and expect to claim more often.
- You're a newer driver with a higher probability of a minor collision.
- Your car is financed — lenders sometimes require low deductibles on comprehensive and collision.
When a high deductible makes sense
- You have 3–6 months of living expenses saved — the deductible won't break you.
- You have a clean record and low annual mileage.
- Your car is older and not worth a large repair bill — raising the deductible keeps premiums proportional to the car's value.
- You want to self-insure small dents and use the policy only for large losses.
The UK voluntary excess decision
In the UK, you'll be asked for a voluntary excess on top of the compulsory excess the insurer sets. Adding £200–£500 in voluntary excess can shave 10–20% off premiums. The same principle applies: only take on voluntary excess you can genuinely pay. If your compulsory excess is already £350 and you add £300 voluntary, a claim could cost you £650 before the insurer pays a penny.
Common mistakes
- Choosing the highest deductible to minimise premiums, then not saving the difference. If you raise the deductible, put the monthly saving into an emergency fund.
- Applying deductibles to third-party claims. Deductibles don't apply to liability. Don't confuse the two.
- Never reviewing your deductible. As your savings grow or your car depreciates, your optimal deductible changes — review it at every renewal.
Frequently asked questions
What is the most common car insurance deductible?
Should I raise my deductible on an old car?
Does my deductible affect liability claims?
Can I change my deductible mid-policy?
What is a vanishing deductible?
Sources & further reading
- Kelley Blue Book — How to Choose Your Car Insurance Deductible 2026
- WalletHub — Car Insurance Deductibles Guide 2026
Figures, prices and policy details were current at the last-updated date above. Automotive pricing, incentives and regulations change frequently — verify time-sensitive details with the linked primary sources. Read our editorial policy and fact-checking standards.
