Mobile mechanics send an estimate before starting any repair beyond a basic service, especially when parts must be ordered or the problem is not yet diagnosed. Customers often compare your quote to a shop's, so it should show labor, parts, and the convenience of coming to them. A clear written quote also serves as the customer's authorization to start work.
When to use estimates: Use estimates to provide project quotes and get client approval before starting work. Once approved, convert your estimate to an invoice with one click to collect payment.
Create an invoice for payment collection
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Invoice_1001_Client_2026-10-14.pdf
Parts pricing and book time depend on the exact engine and trim, so a wrong vehicle can make the quote wrong.
Ties the quote to the customer's complaint, so you are not blamed for other problems that appear later.
Part quality changes the price and warranty. Customers should know what they are approving.
Shows how the total was built and sets expectations if the job runs longer.
Extra fees are the most common reason a customer says the final bill was higher than quoted.
Seized bolts, broken clips, or related failed parts can add work. Say that you will contact the customer for approval before going over.
You need a level, safe surface and enough room to work. State that jobs may be rescheduled for rain or unsafe locations.
Parts prices change, so a quote that is valid for 7 to 14 days protects your margin.
| Service | Priced | Typical range |
|---|---|---|
| Diagnostic (check engine light, no-start, electrical) | flat fee | $75-150 |
| Hourly labor | per hour | $80-140 |
| Trip / service call fee | per visit | $30-85 |
| Brake pad and rotor replacement (labor only, one axle) | flat fee | $150-300 |
| Battery replacement (labor only) | flat fee | $40-100 |
| Oil and filter change (synthetic, labor and disposal) | flat fee | $50-100 |
| Starter or alternator replacement (labor only) | flat fee | $150-350 |
| Pre-purchase inspection | flat fee | $100-200 |
Typical US ranges. Rates vary by region, experience, and job size.
If you have not yet found the cause, give a diagnostic fee and a likely repair range, then send a firm quote once you know. Avoid committing to a fixed price on a guess.
Use a labor guide's time for the job, then adjust for working outdoors without a lift. Charging for how fast you are punishes you for experience.
Note that the customer saves a tow, a ride, and a day without their car. Put the trip fee and the repair on the same quote so the total can be compared to a shop's.
Giving two or three part tiers lets the customer pick by budget and makes the quote easier to accept. Show the price and warranty difference for each.
Rules differ by state. Many states require a written estimate for repairs above a set amount and limit how far the final bill can exceed it without the customer's approval. Check your state's automotive repair rules.
Simple quotes for known repairs are usually free. If an estimate requires diagnostic work, charge a diagnostic fee and tell the customer before you start.
Stop and contact the customer with the issue, price, and photos. Get their approval in writing, such as a text reply, before doing the extra work, and add it to the final invoice.
Seven to 14 days is typical. Parts prices and availability shift quickly, so put an expiration date on the quote and re-quote if the customer waits longer.
Use the Mobile Mechanic invoice template to bill the client, or convert this estimate once it's approved.
Mobile Mechanic invoice template