What it means
When you sell goods or services on credit, you record the sale as revenue and the unpaid amount as an asset called accounts receivable. However, not every customer will pay their invoice, because some may go out of business, dispute a bill, or simply disappear.
Instead of waiting years to write off the loss, accounting rules require you to make a sensible estimate of how much cash you will fail to collect. This is where the allowance comes in.
It sits on your balance sheet as a contra-asset, meaning a negative balance that directly reduces the total value of your accounts receivable. Without it, you would overstate your profits and assets, and your financial reports would look healthier than they really are, which can lead to poor business decisions.
Creating this allowance also respects the matching principle, which requires expenses to be matched to the revenues they helped generate. If a sale made this year turns bad next year, the estimated loss should ideally be acknowledged promptly.
Businesses usually calculate the allowance from past payment trends, such as writing off a fixed percentage of total credit sales or ageing their invoices to see how long bills have been overdue. In practice, this is an accounting estimate rather than an exact science.
When a specific customer officially fails to pay, you remove that invoice from receivables and use up part of the pre-made allowance. If a customer whose debt was written off later pays, you can reverse that specific write-off, and monitoring the allowance over time helps managers spot worsening credit risks early.
In practice
Real-world examples
Example 1
A freelance web designer has $10,000 in unpaid client invoices at the end of the month. From past experience, about 5% of her invoices end up unpaid, so she estimates that $500 of the balance will not be collected. She records an allowance for doubtful debts of $500 so her reported receivables reflect what she realistically expects to collect. When a client later pays in full, she can release the unused portion of the allowance.
Example 2
A regional office supplier has $150,000 in outstanding customer accounts, and several have run past their normal payment terms. The finance team reviews the overdue accounts and sets aside a $7,500 allowance, which is 5% of total receivables, to cover clients who may struggle to pay. The sales director then contacts the three largest overdue customers to agree on payment plans. The allowance gives leaders a clear view of the risk while those conversations take place.
Example 3
A manufacturing firm makes $1 million of credit sales in a year and applies a 2% rate based on its own history of unpaid bills. The firm records a $20,000 allowance to cover potential insolvencies among its customers. The allowance is reviewed each quarter against the ageing report, and any change is booked as an adjustment to the bad debt expense.
Think of it
Imagine baking a large batch of bread to sell at a local market. You know from past weekends that a few loaves might get dropped, stale out, or go unpaid by friendly neighbours. Instead of counting those missing loaves as guaranteed cash, you mentally set aside a couple of slices so you do not overspend your expected earnings.
Formula
Calculation
Estimated Doubtful Debts = Total Accounts Receivable x Estimated Percentage Uncollectible. For example, if your business has $50,000 in accounts receivable, and historical data shows that 4 percent typically ends up unpaid, your calculation is $50,000 multiplied by 0.04, which gives an allowance of $2,000. Your net accounts receivable on the balance sheet would then be reported as $48,000.Case study
Seen in the real world
This is a fictional, illustrative scenario. Bright Spark Electrical, a mid-sized contracting firm, finished the financial year with $200,000 sitting in accounts receivable. The managing director, Sarah, knew that two commercial clients were currently struggling to pay their bills, while the rest of her customer base was reliable. To keep her balance sheet accurate and follow accounting standards, Sarah instructed her bookkeeper to set up an allowance for doubtful debts. Looking at historical data, Bright Spark typically lost about 3 percent of its credit sales to non-payment.
However, given the current economic climate, Sarah decided to use a conservative estimate of 4 percent, resulting in an allowance of $8,000. This meant the balance sheet reported net receivables of $192,000 instead of the full $200,000. Three months later, one of the struggling clients officially entered liquidation, owing Bright Spark $5,000. Because Sarah had already anticipated this risk, the company did not suffer a sudden, unexpected profit shock. Instead, the $5,000 bad debt was written off directly against the pre-existing allowance, keeping financial reporting smooth, honest, and completely transparent for stakeholders.
Watch out
Common mistakes
- Waiting until a customer officially goes bankrupt before recording any potential loss, which overstates short-term profits.
- Guessing the allowance percentage randomly instead of basing it on historical payment data and customer aging reports.
- Confusing the allowance for doubtful debts with an actual bank account where physical cash is set aside.
Questions
People also ask
Is this allowance the same as writing off a bad debt?
No. An allowance is an educated guess about future losses on a group of invoices. A write-off is the removal of a specific, confirmed unpaid invoice when you know for certain the money is gone.
Does creating this allowance mean I lose real cash?
No cash leaves your bank account. This is a non-cash bookkeeping entry designed to adjust your profit and asset figures to reflect realistic expectations.
How do I choose the right percentage for my business?
You look at your past financial records to see what proportion of past credit sales or receivables turned into bad debts over previous years.