How to Write Off Unpaid Customer Invoices | Fora Financial Blog
How to Write Off Unpaid Customer Invoices
July 28, 2020

How to Write Off Unpaid Customer Invoices

Unpaid customer invoices are an unfortunate, but sometimes inevitable, part of doing business. Although the experience isn’t pleasant, it’s still vital that you know how to appropriately collect unpaid invoices.

After all, unpaid invoices can wreak havoc on your business. An unpaid invoice means you’re not getting paid for the products or services you provided. If your business isn’t paid for goods or services provided, you’ll likely experience cash flow problems. Without this capital, you can’t make investments in a timely manner that will keep the business growing.

Therefore, having lots of unpaid invoices on your books means that you may be paying tax on income that you haven’t received. Again, that’s extra money going out the door that could be reinvested in new or updated equipment, fresh inventory, and other necessary expenses.

Of course, you should work on creating a system that minimizes unpaid customer invoices. However, sometimes it’s unavoidable, so you’ll need to know how to write off unpaid professional invoices. Before we outline that process, though, we’ll help you determine whether you’re eligible to write off an invoice.

4 Steps to Take When Writing Off Unpaid Invoices

1. Determine Your Eligibility

The IRS says that if you use cash-method accounting, you generally can’t write off unpaid invoices. This is because when you use the cash method of accounting, you only count revenue when you receive it. With an unpaid invoice, you never receive revenue, so you have no revenue from which to write off the unpaid invoice.

With accrual-based accounting, on the other hand, you would have counted income when you earned it. However, once you determine that you’re not getting paid for that invoice, you need to write it off as a bad debt so you’re not paying more tax than you should.

2. Qualify Your Unpaid Invoices as Bad Business Debt 

How you write off unpaid customer invoices will vary based on your tax status. However, even before figuring out the logistics of writing off your invoice, you need to ensure that the unpaid invoice qualifies as what the IRS calls a “bad business debt.”

An overdue invoice isn’t automatically a bad business debt. In fact, you must be able to prove that the unpaid invoice is worthless, that it’s related to your small business, and that you suffered an economic loss. If you can’t prove all three statements are true, the IRS won’t consider your unpaid invoice to be a bad debt, which means you can’t write it off.

3. Assemble the Proof

The IRS is very strict about writing off bad debt, so you should ensure you have a strong basis from which to claim that your unpaid invoices are eligible to be written off.

To prove that the invoice is worthless, you’ll need documentation that your customer went bankrupt, died, or otherwise won’t pay you. You should also keep track of your efforts, including emails and letters, to collect the outstanding invoice.

In addition, be sure to provide the invoice number, what the invoice’s due date was, and how overdue it is at this time. In some cases, it may be smart to hire a collection agency.

Proving that you suffered an economic loss is straightforward if you used the accrual basis for accounting. Still, you should have documentation of the business income you reported that has become the bad debt you’re claiming.

Finally, to prove your unpaid invoice is a business debt, your client must have had a legal obligation to pay you. Any contract documents that you have with your client should be sufficient as proof of a legal obligation.

4. Write Off the Bad Debt

Once you’ve determined that an unpaid invoice is worthless, you can write it off when it comes time to file taxes. If an unpaid invoice from a previous year becomes worthless, you’ll have to file an amended return for a refund of the tax you paid.


If you use the cash-based method of accounting, it may feel as though you’re getting the raw end of the deal. In reality, no one wins when unpaid invoices become worthless. If you’re eligible to write off the unpaid invoice, it’s only because you would’ve had to pay taxes on income that didn’t exist anyway.

Hopefully, you can avoid unpaid invoices altogether, but if you face this issue, you can now rest assured that you’re prepared to handle it!

Editor’s Note: This post was updated for accuracy and comprehensiveness in July 2020.

Fora Financial

Editorial Note: Any opinions, analyses, reviews or recommendations expressed in this article are those of the author's alone, and have not been reviewed, approved, or otherwise endorsed by any of these entities.

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Fora Financial is a working capital provider to small business owners nationwide. In addition, the Fora Financial team provides educational information to the small business community through their blog, which covers topics such as business financing, marketing, technology, and much more. If you’d like to see a topic covered on the Fora Financial blog, or want to submit a guest post, please email us at [email protected].