What Numbers Should a Small Business Owner Track Every Month?

By Bill Stilwell · Last reviewed October 17, 2026

The short answer

Track eight numbers every month: revenue, gross margin, net income, cash balance, money customers owe you, bills you owe, how much work you have room for, and how much of your revenue comes from your biggest customers. Together they tell you whether the business is earning money, has cash to operate, and can take on more.

Why it matters

Revenue alone hides problems. A remodeling company can book record sales and still run out of cash because customers pay late and suppliers want payment now. A few numbers, checked monthly, catch that before it becomes a crisis.

21.1.1 Revenue

What it means: money from sales, measured the way your books are set up.

How to do it: the Internal Revenue Service (IRS) says that under the cash method, income is reported when you receive it, and under the accrual method, generally when you earn it. Know which method your books use (see 10.1.4 Accounting Method). Track both “collected” and “billed” if you can, so you see the gap.

Common mistake: counting a signed contract as revenue before the work is done or paid.

21.1.2 Gross margin

What it means: revenue minus direct delivery cost, such as materials, job labor, and subcontractors.

How to do it: set up your chart of accounts so direct costs are separate (see 10.5.1 Chart of Accounts). Divide gross profit by revenue to get a percentage, and watch the trend.

Common mistake: putting job materials in the same account as office supplies.

21.1.3 Net income

What it means: profit after all operating expenses.

How to do it: read it from your monthly profit and loss report (see 10.5.8 Financial Reports). Remember that owner draws aren’t an expense for most small business structures, so net income isn’t the same as what you took home.

Common mistake: treating money in the bank as profit.

21.1.4 Cash balance

What it means: cash you can use right now.

How to do it: check the bank balance after setting aside tax money (see 10.4.2 Tax Reserve Account). Compare it to the number of weeks of expenses it covers.

Common mistake: spending tax money because it’s sitting in the operating account.

21.1.5 Receivables

What it means: money customers owe you.

How to do it: run an aging report showing what’s current, 30, 60, and 90 or more days late (see 10.5.6 Accounts Receivable and 16.6.5 Late Payments and Collections).

Common mistake: only noticing late payers when cash gets tight.

21.1.6 Payables

What it means: bills and obligations you owe.

How to do it: list what’s due in the next 30 days, including loan payments and tax deposits (see 10.5.7 Accounts Payable).

Common mistake: forgetting quarterly or annual bills like insurance renewals.

21.1.7 Capacity

What it means: how much more work you can deliver.

How to do it: compare booked hours to available hours for the next two to four weeks (see 7.1.9 Capacity). Use it before raising ad spend.

Common mistake: buying more leads when the schedule is already full.

21.1.8 Customer concentration

What it means: how much you depend on a few customers.

How to do it: each month, figure what percent of revenue came from your top one and top five customers (see 24.5 Customer Concentration).

Common mistake: not noticing that one property manager has become half your business.

When to get help from a pro

A CPA or bookkeeper can set up your books so these numbers come out of reports instead of guesses. Questions to ask:

Are my direct costs separated so I can see gross margin?
Is my bookkeeping on the cash or accrual method, and what does that mean for my reports?
Can you send me a one-page monthly summary with these numbers?

Bill’s note

[Bill: add a short note. For example, which of these numbers you look at first each month, and why.]

How I did this for SiteSmarty

[Date I did this:]
[What I actually did, step by step: where each number comes from in SiteSmarty’s books and tools]
[What it cost and how long it took:]
[What surprised me or what I’d do differently:]
[Screenshot or photo to add, with private info blurred: the monthly metrics row]
[Result so far:]

Questions people ask

What’s the difference between revenue and profit? Revenue is money from sales. Profit, or net income, is what’s left after all expenses.

What is gross margin? Revenue minus the direct cost of delivering the work, often shown as a percentage.

Why does cash matter if I’m profitable? You can be profitable on paper and still short on cash if customers pay late.

What is customer concentration? How much of your revenue comes from a few customers. High concentration means more risk if one leaves.

Audit check

Outline line	Question	Pass looks like	Fail looks like	Evidence to collect
21.1.1 Revenue	Is revenue tracked monthly on a known accounting method?	Method known, collected and billed tracked	Contracts counted as revenue	Profit and loss report
21.1.2 Gross margin	Is gross margin calculated from separated direct costs?	Direct costs separate	Mixed accounts	Chart of accounts, report
21.1.3 Net income	Is net income read from a monthly report?	Monthly report	Bank balance used	Profit and loss report
21.1.4 Cash balance	Is cash checked after tax set-aside?	Weeks of cash known	Tax money counted	Bank statements
21.1.5 Receivables	Is an aging report reviewed monthly?	Aging report	No report	Aging report
21.1.6 Payables	Are upcoming bills listed?	30-day list	Surprise bills	Payables list
21.1.7 Capacity	Is capacity checked before adding work?	Booked vs available hours	Not tracked	Schedule report
21.1.8 Customer concentration	Is top-customer share tracked?	Percent recorded	Unknown	Revenue by customer report

Where this fits

Do this first: 10.5.8 Financial Reports, 10.5.3 Bank Reconciliation

Do this next: 21.2 Marketing Metrics

Sources

IRS, Publication 538, "Accounting Periods and Methods" (checked October 17, 2026)

This page explains general rules and Bill's own experience. It is not legal, tax, or insurance advice. Talk to a qualified professional about your situation.