Reading Your Shop's Numbers Without Being an Accountant
You do not need a finance degree to understand whether your shop is healthy. Here are the five numbers to check weekly and what they are actually telling you.
By BayOps Team
See related featureReading Your Shop's Numbers Without Being an Accountant
Most shop owners have a complicated relationship with their financials. They know the business well — the operations, the customers, the team, the costs — but the numbers that show up in a report often feel like a different language. Revenue, gross margin, accounts receivable, cash basis versus accrual: these are terms that belong to accountants, not to people who got into the business to fix cars.
The result is that financials get reviewed once a quarter when the bookkeeper sends something, or once a year at tax time, rather than treated as a live management tool. And that gap — between what the numbers know and what the owner knows — is where surprises come from.
This guide is not about accounting. It is about the five numbers a shop owner should look at every week to know whether the business is moving in the right direction, why each one matters, and what to do when one of them looks wrong.
Number 1: Revenue This Week vs. Your Usual Run Rate
Revenue — the total amount invoiced for completed work — is the starting point for everything else. But a single week's number is not as useful as that number compared to your typical week.
Every shop has a rhythm. Certain months are busier. Certain days are slower. A number in isolation — "we invoiced $24,000 this week" — tells you relatively little. That same number compared to your average over the last twelve weeks tells you a lot. Is this a normal week, a slow one, or an unusually strong one?
What to watch for: two or more consecutive weeks that are meaningfully below your typical run rate. One slow week is noise. Two slow weeks is a pattern worth investigating. Are you behind on estimates? Is the job board lighter than usual? Are customers taking longer to approve?
Number 2: Jobs Completed vs. Jobs in Progress
This ratio tells you how well work is flowing through your shop.
If you have twenty jobs in progress and completed five this week, work is stacking up faster than it is flowing out. That is not necessarily a problem — it depends on your capacity and your backlog — but it is worth understanding. Are jobs getting stuck at a particular stage? Are parts delays creating a pile-up? Is the QC stage a bottleneck?
If you are completing jobs faster than new ones are coming in, that is the signal to think about marketing, capacity, or whether there is a scheduling gap that is creating idle bay time.
This number is most useful as a trend. If the ratio of in-progress to completed has been getting worse over the past month, something has changed in the flow of work and it is worth finding out what.
Number 3: Your Accounts Receivable Balance — and How Old It Is
Accounts receivable — often abbreviated as AR — is the total amount of money that customers and insurance carriers owe you for work that has been invoiced but not yet paid.
A high AR balance is not inherently bad. It reflects how much work you have done recently. But the age of that balance is what matters. Money that has been owed for less than thirty days is normal. Money that has been owed for sixty or ninety days is a problem.
This is called AR aging — breaking down your total receivable balance into buckets based on how long each invoice has been outstanding. A healthy shop has most of its AR balance in the under-thirty-day bucket. A shop with a significant portion in the sixty-plus-day bucket either has a collections process that is not working or specific customers and carriers that need attention.
What to do with it: once a week, look at anything over forty-five days. Pick up the phone. Most overdue balances are not customers refusing to pay — they are customers who forgot, or insurance payments stuck in an adjuster's queue. A direct call or a text with a payment link usually resolves them quickly.
Number 4: Parts Margin
Parts margin is the difference between what you pay for parts and what you charge customers for them, expressed as a percentage of what you charge.
If you buy a part for $200 and charge $280, your parts margin is about 29%. If that same part goes up to $230 at your supplier and you do not update your pricing, your parts margin drops to about 18% without anyone noticing.
This erosion is extremely common in shops, and it happens silently because no single job looks dramatically different. It is the accumulation of small price increases from suppliers, unchecked against the pricing on estimate templates, that gradually compresses margin across hundreds of jobs.
What to watch: look at your overall parts margin monthly, and compare it to where it was six months ago. If it is trending down, the likely culprits are supplier price increases that have not been passed through to customers, or parts categories where pricing was set a long time ago and has not been revisited.
Number 5: Cash on Hand vs. What You Owe Suppliers
This one is the most direct indicator of day-to-day financial health, and the one that shop owners with paper-based tracking systems often do not have visibility into until it becomes a problem.
Cash on hand is what is in your account. What you owe suppliers — your accounts payable, or AP — is the total of unpaid supplier invoices. The difference between the two is your net cash position.
A shop that has $40,000 in the bank but $35,000 in unpaid supplier invoices due this week is in a very different position than a shop with $40,000 in the bank and $8,000 in supplier invoices. The bank balance alone is misleading without knowing what is owed.
The goal is not to eliminate AP — paying suppliers is a normal part of running a shop. The goal is to know what is owed, when it is due, and whether the cash to pay it is there or expected before the due date. Surprises in this area are almost always the result of not tracking it in real time.
How to Actually Look at These Numbers Weekly
Tracking these five numbers manually is possible but tedious. The more practical approach is to have them visible in a dashboard or report that updates automatically as jobs are completed, invoices are sent, and payments are recorded.
The key insight is that these numbers are all connected to the same underlying data — your estimates, invoices, payments, and parts expenses. When that data lives in one place, the numbers can be surfaced without anyone having to compile them manually.
A ten-minute weekly review of these five numbers — revenue trend, flow ratio, AR aging, parts margin, and cash position — is not accounting. It is operational visibility. It tells you what to pay attention to before a problem becomes urgent, and it gives you the information to make decisions rather than just react to what has already happened.
BayOps includes accounting and reporting features that surface revenue, AR aging, parts margin, and payment history in one place — designed for shop owners who want clear numbers without spreadsheet work. See the reporting features.