You finished the job. You sent the invoice. And now you are waiting, with no real idea when the money lands or what to do if it does not.
That waiting has a name in accounting: accounts receivable. It sounds like something only a bookkeeper needs to care about. It is actually just a list of people who owe you money for work you already did. This guide explains the words, shows you the process that gets you paid faster, and covers where our own service fits and where it does not.
Every unpaid invoice is a loan you made without meaning to. You paid for the materials, you paid your crew, and you are waiting to be paid back. Nobody called it a loan, but that is what it is.
Key takeaways
- Accounts receivable is just the money customers owe you right now. Nothing more complicated than that.
- The clock starts when you send the invoice, not when you finish the work.
- Two simple reports tell you if things are going well: how old your unpaid invoices are, and how long people take to pay on average.
- 59% of US small businesses are carrying invoices at least 30 days past due, up from 47% a year earlier.
- If your business files taxes on a cash basis, and most small ones do, you usually cannot write off an invoice that never gets paid.
What Is Accounts Receivable, and What Is the Waiting Costing You?
Most guides on this topic start using terms in the second paragraph without explaining them. Here is the short version, in plain English.
Accounts receivable (often shortened to AR) is the total of what your customers owe you for work you have already delivered. If you sent three invoices last month for $4,000, $2,500 and $1,000, and nobody has paid yet, your accounts receivable is $7,500. That is the whole idea.
Payment terms are your rules for when payment is due. Net 30 means the full amount is due 30 days after the invoice date, so an invoice dated March 3 is due April 2. It is counted from the invoice date, not from the end of the month. Net 15 means 15 days, and "due on receipt" means now. You will occasionally see net 30 EOM, which does count from the end of the month and is a longer wait, so if a customer proposes it, know that you are agreeing to something different. The number is your choice, not an industry rule, and shorter terms usually get paid sooner.
An aging report is a list of your unpaid invoices sorted by how late they are. Not by client, not by amount. By age. Most bookkeeping software makes it in one click, and it is the single most useful page in the whole system.
Days sales outstanding (DSO) is the average number of days it takes you to get paid. If your DSO is 22, then on average money reaches you 22 days after you invoice.
A bad debt is an invoice you have given up on collecting. It is different from a late one, and as you will see below, it is not as easy to write off as most owners assume.
Cash basis and accrual basis are the two ways of doing your books. On cash basis, you record income when the money actually arrives. On accrual basis, you record it when you send the invoice, before the money shows up. Most small businesses use cash basis. It matters more than it sounds, and we come back to it.
So what does the waiting cost? Usually not what owners expect. The invoice that never gets paid at all is real, but rare. The ordinary cost is time. You bought materials in March, paid your crew in March, and the customer pays you in May. For those weeks you covered their project out of your own account, charged nothing for it, and neither of you called it a loan.
That gap is getting wider. 59% of US small businesses now carry invoices at least 30 days past due, up from 47% a year earlier. For a one-person or small-crew business, a single 60-day invoice is often the difference between making payroll easily and moving money around to cover it.
One reframe worth keeping: getting paid is not admin that happens after the real work. It is the last step of the work, and the only one that turns your effort into money you can spend.
What Does Getting Paid Look Like, Step by Step?
Seven steps. Five of them happen before anything is late, which is the part most people miss.
- Agree the terms before you start. Put payment terms in the proposal, not in the invoice at the end. When it is due, whether you need a deposit, and what happens if payment is late. One thing worth knowing: a late fee is only enforceable if the customer agreed to it in writing before the work started, and several states cap how much interest you can charge on an overdue balance. Nobody argues with terms they already signed.
- Know who you are trusting. On a big job with a new customer, take ten minutes. Ask for a reference, or take a bigger deposit up front. You are about to fund their project. You would not hand over that much cash without asking.
- Send the invoice the day you finish. This is the cheapest improvement available to you. The clock starts when the invoice goes out, not when the work ends. Every day in between is a day you added to your own wait, for free.
- Make it easy to pay and hard to question. Write a real due date, not "net 30." List what the charges are for, in the words you used when you agreed the job. Add a payment link. Most late payments are not refusals, they are an invoice sitting in someone's inbox with a question nobody asked out loud.
- Follow up on a set schedule. Three days before it is due, on the due date, then at 7, 14 and 30 days late. Decide the schedule once. Then chasing is not a decision you make on a Tuesday night when you are tired and would rather not.
- Know your next move before you need it. Reminder, then a phone call, then a formal letter pointing to the terms they agreed, then no new work until it is settled, then a collection agency or small claims court. Two practical notes on that last rung: collection agencies typically take a percentage of whatever they recover, and small claims courts have a dollar limit that varies widely by state, so check your state's before assuming an invoice qualifies. Having the ladder written down is what stops the real choice most owners face, which is say nothing or threaten a lawsuit.
- Match payments to invoices as they arrive. If you do not, two things go wrong. You chase somebody who already paid, and your list of who owes what stops being true.
Steps 3 through 5 are where almost all of the recoverable money is. Steps 1 and 2 are where you avoid the invoices that never get paid at all.
Which Two Reports Tell You If It Is Working?
Two, and both take minutes.
The aging report. Your unpaid invoices, sorted by how overdue they are: not yet due, 1 to 30 days late, 31 to 60, 61 to 90, and over 90. Look at it weekly. You are not looking at the total. You are looking at the shape. A stack in the 1-to-30 column is a follow-up problem, and follow-up is fixable. A stack past 90 days is a different problem, because invoices that old often do not get paid in full.
Days sales outstanding. Sounds technical, it is one division. Take your average unpaid balance, divide it by the sales you invoiced in the period, and multiply by the number of days in that period.
An example, made up for illustration. Say you typically have $60,000 unpaid at any moment, and you invoiced $240,000 over a 90-day quarter. That is 60,000 divided by 240,000, which is 0.25. Multiply by 90 days and you get roughly 22. So on average, you wait 22 days to get paid.
The number on its own means little. The direction means everything. Check it once a quarter. If it is climbing, either your follow-up is slipping or you are taking on slower-paying customers, and both are worth knowing before you feel it in the bank account.
One more thing to watch if a few customers make up most of your work. If one customer is more than a quarter of what you are owed, their payment habits are now your cash flow, no matter how good your process is.
An aging report is not paperwork. It is a list of decisions you have not made yet, sorted by how expensive waiting has become.
What Goes Wrong, and Who Should Be Watching?
Four things, and only the first is obvious.
The invoice that never gets paid. Here is the part most owners find out too late. You can only deduct a bad debt in the year you accept it is worthless. And if you file on cash basis, which most small businesses do, you generally cannot deduct an unpaid invoice for your services at all. The reason is almost annoying in its logic: on cash basis you never recorded that money as income, so there is nothing to subtract. You lose the work, the materials and the hours, and the tax return does not soften the blow. Ask your CPA about your own situation, but do not count on a write-off that may not exist.
Slow payment turning into a habit. One customer at 60 days is one customer. Four customers at 60 days is how your business now runs, and you did not choose it. The aging report catches this while it is still fixable.
Arguments that surface at the worst moment. A customer who questions the invoice in week six was usually confused in week one. Clear line items and a quick check-in a few days after sending turn most of these into payments.
Borrowing expensively while you wait. This is the real danger. Advances against future sales are fast and easy to get, and what they actually cost is far more than a bank loan. Getting your invoices paid on time is the cheapest financing decision available to a small business.
All four need the same thing: somebody looking every week. Not monthly, not at year end. Weekly, because the difference between a 20-day-old invoice and a 50-day-old one is mostly whether anyone noticed in time.
That watching is what Clearbook does. Invoicing, matching payments, and follow-up run continuously, and a real bookkeeper reviews what comes up and tells you which accounts actually need a decision from you. To be straight about the limits: this is not a DIY tool, so if you want to keep your hands on the books yourself it is the wrong fit, and we do not run payroll or file your taxes. We keep your books current and your receivables visible, so your CPA works from clean records.
Pull your aging report this week and sort it by age. If something past 45 days surprises you, the problem was never collections. It is that nobody was watching, and that is a job you can hand to someone else.
FAQ
What is accounts receivable in simple terms?
It is the money your customers owe you right now for work you have already done. If you have sent invoices that nobody has paid yet, add them up, and that total is your accounts receivable. It counts as something your business owns, even though the cash is not in your account yet.
What is a good DSO for a small business?
There is no universal number, because it depends on your terms. A practical test: your DSO should be close to the terms you set. If you invoice net 30 and your DSO is 45, your terms are decoration. Watch the direction rather than chasing a target, and act if it climbs two quarters in a row.
Can I write off an invoice that never got paid?
Usually not, if you file on cash basis. You can only deduct a bad debt once it is worthless, and cash-basis businesses generally cannot deduct unpaid fees, because that income was never recorded in the first place. Accrual-basis businesses are treated differently. Check with your CPA before assuming either way.
When should I send an unpaid invoice to collections?
Most owners wait too long rather than acting too early. A reasonable pattern: a phone call at 30 days late, a formal notice at 60, and a decision at 90 about a collection agency, small claims court, or letting it go. Agencies take a share of what they recover, and small claims limits vary by state, so weigh both against your odds of recovery.
Clearbook publishes this article and offers services related to the topic, so we have a commercial interest. Nothing here is financial, tax, or legal advice. Consult a qualified professional about your situation. This article describes US practice; payment terms, late fee rules, and small claims limits differ in other countries and by state.