One-bay garage software: what you need
Updated November 11, 2026
A one-bay garage needs fast estimates, written approval links, invoices and vehicle history without staffing tools built for larger shops. If you are the owner, the writer and the tech, most full shop-management suites get in the way.
The must-haves
- Customers and vehicles on file. Name, phone, year, make, model, plate, VIN. Typed once.
- Estimates with parts and labor lines. Your prices, your labor rate, your tax rate.
- A written OK before the work. A signature or a typed-name approval with a time on it. Some states require written authorization, and it settles arguments everywhere.
- Estimate to invoice without retyping. Retyping is where mistakes happen.
- A PDF you can print or email.
- History by vehicle. Every visit, date, mileage and what was done.
The nice-to-haves
Labor guides, parts catalogs with ordering, digital inspections with photos, two-way texting, card processing and marketing reminders are all useful. They are also why suites are priced well over $100 a month. Add them when the shop is busy enough that the time saved pays for them.
What about free options
A spreadsheet or a printed form works on day one. It stops working when you need to find last year’s visit, or when a customer says they never OK’d a part. Free invoice apps made for general businesses don’t know about vehicles, VINs or mileage.
How to pick
- Write one real estimate in it, start to finish, from your phone.
- Check that the customer can approve without making an account.
- Turn it into an invoice and print it. Count the taps.
- Look up the car again a week later. Can you find it by plate?
If those four go smoothly, the rest is extra.
Want the estimate, the customer’s OK and the invoice in one place? AutoBayInvoice is free for 10 repair orders a month, or print the free estimate template.