How do I dispute an auto repair charge that is more than the estimate?

Split the bill by authorization, not by the size of the overrun. The disputable part is work you never authorized plus work charged but not done; everything else on the bill is owed, even if it pushed the total above the estimate. An overrun can include extra work you did authorize, so the overrun alone is never the disputable amount.

Is there a universal percentage a repair shop may exceed an estimate by?

No universal percentage exists in this checker, because any such threshold varies by state. California's rule has no percentage at all: under Bus. & Prof. Code 9884.9 a shop may not charge above the written estimate without the customer's consent, obtained after the estimate proves insufficient and before the extra work is done. Other states have their own rules — check yours.

Can a mechanic keep my car until I pay a bill I dispute?

In many states, yes — repair shops hold a possessory mechanic's lien, for example under Virginia Code 46.2-644.02 and Mississippi Code 85-7-107, and Wisconsin's consumer agency states a shop may hold a vehicle until authorized repairs are paid for. The rule varies by state, so check yours, but never refuse to pay the part you genuinely owe in order to get the car back.

What does pay under protest mean for an auto repair bill?

If a shop will only release your car on payment of the full bill, you pay the full amount with 'paid under protest — disputing $X' written on your copy of the receipt or invoice, and keep that copy. It is a practical documentation step, not a law and not a guarantee, but it gets the car back without surrendering the dispute over the rest.

What are the filing clocks for an auto repair charge dispute?

For credit cards, the Fair Credit Billing Act requires written notice within 60 days after the statement containing the error was sent. For debit cards, Regulation E requires error notice within 60 days after the statement on which the error first appears was sent. Both run from the statement date, not the charge date. Card networks also have an about-120-day filing norm, which is not a law; your issuer's own deadline governs.

Dispute Auto Repair Charge: Free Checker

Dispute Auto Repair Charge: Overcharge & Unauthorized Work Checker

The shop charged more than the estimate, or did work you never approved — so what part of the bill is actually disputable, and how do you pay without losing your car? The answer is a split, not a percentage: the disputable part is work you never authorized plus work charged but not done, and everything else on the bill is owed — even if it pushed the total above the estimate. An overrun can include extra work you did authorize, so the size of the overrun alone proves nothing, and there is no universal overrun percentage: any such threshold varies by state. Enter your estimate, your final bill and the unauthorized amounts, and get the owed-vs-disputable split, the filing clocks, and the pay-under-protest step that gets the car back without surrendering the dispute. No outcome is guaranteed.

How the split works

The clocks, honestly labeled

Every number below is either your bill's own number, which you enter, or a law or network rule named beside it. Where a number belongs to someone else's clock, it says so.

Clock	Who sets it	The rule
Disputable vs owed split	Your authorization record	Disputable = work never authorized + work charged but not done. Owed = final bill minus disputable. The overrun (final minus estimate) is shown for context only — it is never the disputable amount, because authorized extra work is owed and unauthorized work can hide inside the estimate total.
FCBA written notice (credit cards)	Federal law, 15 U.S.C. 1666	Written notice of a billing error to the creditor's billing-disputes address within 60 days after the statement containing the error was sent. Runs from the statement date, not the charge date. While the dispute is investigated you do not have to pay the disputed amount, but you must still pay correct charges on time.
Regulation E error notice (debit)	Federal law, 12 CFR 1005.11	Notice of an error no later than 60 days after the institution sends the periodic statement on which the error first appears. Runs from the statement date, not the charge date.
Network filing window	Card-network norm, not a law	About 120 days from the transaction for most dispute conditions. Labelled a norm on every use: your issuer's own deadline governs, so ask for it in writing.
Authorization above the estimate (California only)	California law, Bus. & Prof. Code 9884.9	A California dealer must give a written estimated price and get authorization before work, and may not charge above the estimate without the customer's consent, obtained after the estimate proves insufficient and before the extra work is done. No percentage threshold — any excess needs consent. Other states have their own rules; this checker does not generalize California's.
Mechanic's lien (varies by state)	State law — examples only	In many states a shop may retain the vehicle until the amount owed is paid: Virginia Code 46.2-644.02 (lien plus retention until just and reasonable charges are paid) and Mississippi Code 85-7-107 (possessory lien) are examples, and Wisconsin's consumer agency states a shop may hold a vehicle until authorized repairs are paid for. Check your own state's rule — the examples prove the trap exists, not what your state allows.

The trap this tool exists to catch

Two traps, both expensive. The first is disputing the overrun instead of the unauthorized work: a bill $300 over estimate with only $50 of unauthorized work has $50 disputable and $750 owed, and disputing the full $300 hands the shop a balance it can pursue while weakening the genuine $50 claim. The second trap is the car itself: refusing to pay anything until the shop "admits" the overcharge is how the car stays held under a mechanic's lien in many states, while storage and leverage pile up on the shop's side. The way through is the pay-under-protest step — pay what you owe to get the car released, and if the shop demands the full bill first, pay it with "paid under protest — disputing $X" written on your copy of the receipt, then dispute the $X. Paying under protest is a practical documentation step, not a law and not a guarantee, but it breaks the standoff without surrendering the dispute. Never try to take the car by force or enter restricted areas; use the complaint ladder instead.

What this tool deliberately does not claim

No universal overrun percentage: none is used, and any page quoting one for all states is guessing about your state. No other state's estimate, authorization, lien, storage-fee or lien-sale rule: only California (authorization and the Bureau of Automotive Repair complaint route), Virginia, Mississippi and Wisconsin (lien examples) are named, and only for what their sources actually say. No card-network reason code for auto repair: none was verified for this category, so none is named. No fee, storage-charge limit, lien-sale timeline or small-claims limit: none was verified, so none is printed. No outcome, percentage or guarantee: the verdict bands are Owed, Partly disputable, Fully disputable and Nothing to dispute only. A badly done job is not treated as an unauthorized charge — quality complaints go to the shop and the regulator, while card disputes here turn on authorization and amount.

Want the full auto repair playbook?

The split worked through with a real bill, the authorization evidence that wins, the lien trap in full, and the complaint ladder step by step — with the checker above the fold.

Read the auto repair overcharge dispute guide

Sources (verified November 3, 2026): CFPB, "How to fix mistakes in your credit card bill" (consumerfinance.gov) for the FCBA 60-day written-notice rule, the billing-disputes address, and the pay-undisputed-charges rule; FCBA 15 U.S.C. 1666; Regulation E 12 CFR 1005.11 for the debit 60-day error-notice rule; Visa/Mastercard ~120-day cardholder filing norm for most dispute conditions; California Bus. & Prof. Code 9884.9 for the written-estimate and above-estimate consent rule; California Bureau of Automotive Repair complaint page for the mediation route and the out-of-state consumer-protection-office direction; Virginia Code 46.2-644.02, Mississippi Code 85-7-107, and Wisconsin DATCP consumer guidance for the possessory-lien examples. Your estimate and authorization record govern your split; your state's law governs the lien; your issuer governs your filing deadline.

General information only — not legal advice. Repair-shop rules, lien rules and issuer rules vary by state and by contract, and your state's law, your paperwork and your issuer govern your case. No outcome is guaranteed by any result on this page.

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