Bad Debt Write-Offs for Contractors: When, How, and What to Do First

Construction contractors carry aging accounts receivable as a matter of course. Retention is held 10-15 months on most projects. Final pay applications wait on closeout documents. Disputed change orders sit in receivables while the parties argue. Most of it eventually collects. Some of it doesn't.

The balance that doesn't collect has to come off the books eventually. Writing it off — removing it from receivables and recognizing the loss — is a specific accounting and tax event. Done too quickly, the contractor writes off amounts that might still have been collected with one more push. Done too slowly, the balance sheet carries phantom receivables that distort metrics and invite audit issues.

The right process has three parts: a collection discipline that exhausts reasonable options before write-off, an accounting method that matches the business's size and regulatory profile, and a tax discipline that claims the deduction in the right year with defensible documentation.

Collection Steps Before Write-Off

Before writing off a receivable, the contractor should generally have exhausted the reasonable collection steps. "Reasonable" depends on the size and nature of the receivable, but a typical sequence looks like this:

Not every receivable justifies going through every step. A $2,500 receivable isn't worth a lawsuit that costs $8,000 to prosecute. A $250,000 receivable probably is. The decision at each stage is whether the next step's cost and time investment makes economic sense.

The collection process also builds the record that supports the write-off. An auditor reviewing a $180,000 bad debt write-off wants to see that reasonable steps were taken — not that the receivable was simply given up on. A write-off file with the demand letters, the lien filings, the attorney correspondence, and the eventual collection conclusion is the defensible version.

Lien and Bond Rights: The Construction-Specific Layer

In construction, the lien and bond claim systems give contractors collection tools that don't exist in other industries. A mechanic's lien attaches to the project property and gives the contractor a secured claim that survives the general contractor's bankruptcy. A payment bond claim on a bonded project gives the contractor a claim against the bonding surety, which is typically a highly-rated insurance company.

These rights have deadlines. Miss the lien filing deadline or the bond claim deadline, and the rights lapse. A receivable on a bonded project where the bond claim deadline passed without action is a receivable that lost its best collection path — the write-off is both appropriate and evidence that the collection process wasn't run well.

For healthy collection practice, every construction receivable that's aging should get reviewed against the applicable lien/bond deadlines. Before writing off a $200K receivable, the contractor should be confident that the lien deadline was either met (and the lien is still being pursued) or that the lien was never going to be the collection path (because the project wasn't lienable, or the deadline passed before the issue was understood).

Direct Write-Off vs. Allowance Method

There are two main accounting methods for recognizing bad debt. The direct write-off method recognizes bad debt expense at the moment a specific receivable is judged uncollectible — the receivable is removed from the books and an expense is recognized. The allowance method estimates bad debt in advance, records an allowance (contra-asset) against receivables, and writes off specific receivables against the allowance without an immediate P&L impact.

GAAP requires the allowance method for financial statement purposes. Companies with audited or reviewed financial statements use the allowance method. Smaller contractors without audited statements sometimes use the direct write-off method for simplicity, though this understates receivables for any period where collection problems are known but not yet crystallized.

For tax purposes, the direct write-off method is required by the IRS for most taxpayers. The allowance method is not deductible for tax; only specific write-offs of specific identifiable debts are. This creates a book-tax difference for companies using the allowance method for GAAP — the book allowance isn't deductible, and the tax deduction happens when specific receivables are written off.

The Allowance Calculation

Under the allowance method, the contractor estimates the portion of current receivables that will eventually be uncollectible. The estimate can be calculated several ways:

The aging-based method is common in construction because it reflects the reality that receivables age differently depending on the type (retention ages 12+ months normally; a final-pay receivable past 90 days is in a different risk category than retention past 90 days). Modified aging methods that separate retention from other receivables work well.

When to Write Off Under Each Method

Under the allowance method, write-offs happen when a specific receivable is finally deemed uncollectible. The entry is: debit allowance, credit receivable. No P&L impact — the expense was recognized when the allowance was booked. The specific receivable just transfers from receivables to the allowance reduction.

Under the direct write-off method, the write-off is the expense recognition event. The entry is: debit bad debt expense, credit receivable. The P&L is hit in the period of write-off.

The timing question under both methods: when is a specific receivable "deemed uncollectible"? There's no single rule, but common triggers include: debtor bankruptcy with discharge of the debt, statute of limitations expired on collection, judgment obtained but asset search shows no collectible assets, settlement agreement writing off part of the debt, or management determination supported by collection file that no further steps are economically justified.

Partial Write-Offs and Settlements

Sometimes a receivable partially collects. A $150,000 receivable settles for $75,000 cash. The $75,000 received is applied against the receivable; the $75,000 gap is either written off immediately (if clearly abandoned) or kept on the books if a further claim might be pursued. A settlement agreement that specifically releases all claims in exchange for the settlement amount converts any remaining balance to an immediate write-off.

When a receivable is partially written off on a judgment basis (management decides $30K of a $100K receivable probably won't collect), that partial amount can be allowanced under the allowance method. The remaining $70K stays in receivables pending continued collection efforts.

Reversal of a Write-Off

Occasionally, a written-off receivable collects unexpectedly. A bankruptcy estate makes a late distribution. A judgment debtor comes into money. A lien that was written off as uncollectible actually forecloses. When collection happens after write-off, the write-off is reversed: the receivable is re-established and the collection is applied.

The reversal creates income in the period of collection (bad debt recovery income). For tax purposes, the recovery is taxable income in the year received. The GAAP treatment depends on whether the original write-off was through allowance or direct — either way, the recovery is income.

Documentation That Survives Audit

A write-off file should capture: the invoice(s) being written off, the collection history (calls, letters, liens, lawsuits), the specific determination of worthlessness (bankruptcy notice, judgment with asset search, settlement agreement), and the approval authority for the write-off (typically CFO or controller signoff on larger amounts).

For material write-offs (say over $25K or above a threshold the contractor's accounting policy establishes), the write-off approval should involve more than the AR clerk. Some policies require written authorization from finance leadership; some require policy-level approval at specific dollar thresholds. The reason is that write-offs reduce reported assets and income, and the accountability for that reduction needs to sit with the right decision-makers.

Bottom Line

Bad debt write-offs are a normal part of construction business. The discipline is in the sequence: collection steps exhausted first, lien and bond rights preserved before deadlines, accounting method applied consistently (allowance for GAAP, direct write-off for tax), tax deduction claimed in the year of actual worthlessness, and documentation kept to survive audit. Contractors with a documented collection process and a consistent accounting methodology write off the right amounts at the right times, while those without often either over-extend bad accounts (damaging cash flow) or under-write off (distorting financials). The process is worth codifying into a written policy that the accounting team follows consistently across engagements.