Why It Matters
Bad debt is money you are owed but will never receive. For landlords, it almost always means rent that a tenant failed to pay and that cannot be recovered through collections, a security deposit, or court judgment. Once you determine collection is unlikely, accounting rules require you to remove the receivable from your books and record it as a loss — a bad debt expense.
At a Glance
- Bad debt equals billed rent minus what you actually collect
- Recorded as an operating expense on your profit and loss statement
- Deductible on federal taxes as a business loss (accrual-basis landlords)
- High bad debt rates signal tenant screening or economic problems
- Affects lender underwriting and property valuation at sale
- Average landlord bad debt runs 1–3% of gross scheduled rent
How It Works
The life cycle of bad debt follows a predictable path. First, a tenant misses one or more payments. The amount owed is tracked as an accounts receivable — money due to you. You attempt to collect: phone calls, written notices, late fee assessments. If the tenant vacates, you apply the security deposit. Whatever remains uncovered becomes a candidate for bad debt.
At the point you determine collection is no longer worth pursuing — or legally unlikely — you write off the receivable. On your books, you debit bad debt expense and credit accounts receivable, removing the phantom asset from your balance sheet.
Accrual vs. cash accounting matters here. If you use accrual accounting, you recognized the rent as income when it was due. A write-off creates an offsetting deduction. If you use cash-basis accounting (common among small landlords), you never recognized the income in the first place, so there is no deductible expense — you simply never record revenue that did not arrive.
Tax treatment. Under accrual accounting, bad debt expense is deductible as an ordinary business loss. Cash-basis landlords receive no deduction because they took no income into their tax return. This distinction often surprises investors switching from cash to accrual.
Underwriting impact. Lenders and appraisers apply a vacancy and credit loss factor to gross scheduled rent when calculating net operating income. A property with a documented history of bad debt gets a higher loss factor, reducing appraised value and borrowable equity.
Collection options before write-off. Small claims court is available in most states for disputes under $5,000–$10,000. You may hire a collection agency (typically keeping 25–40% of any recovery). You can report the debt to credit bureaus. If you sell the debt to a third party, any proceeds offset your recognized loss.
Real-World Example
Raj owns a 6-unit building in Phoenix. His gross scheduled rent is $9,600 per month. In March, a tenant in Unit 4 stops paying. Raj serves notices, applies the $1,200 security deposit, and files in small claims court. The tenant owes $2,400 in back rent. The judge awards Raj the full amount, but the tenant skips town and has no attachable wages. Six months later, Raj writes off $1,200 — the amount not covered by the deposit.
As an accrual-basis landlord, Raj deducted $1,200 as a bad debt expense on his Schedule E. His effective bad debt rate for the year was 1.04% of gross scheduled rent ($1,200 ÷ $115,200), well within the 1–3% industry norm. When he refinanced the building that fall, the lender applied a 5% vacancy and credit loss factor — consistent with market comps — so the one-time write-off did not meaningfully impair his loan sizing.
Pros & Cons
- Tax deductible — accrual-basis landlords reduce taxable income by the amount written off
- Forces disciplined bookkeeping — tracking receivables reveals collection problems early
- Signals tenant screening gaps — a spike in bad debt prompts you to tighten criteria before losses compound
- Benchmarking tool — comparing your bad debt rate to market norms helps assess relative performance
- Direct cash flow hit — every dollar written off is revenue that covered real expenses (mortgage, insurance, taxes)
- No deduction for cash-basis landlords — the most common accounting method offers no tax relief
- Cumulative drag on returns — even a 2% bad debt rate erodes a significant share of cash-on-cash return over time
- Complicates underwriting — lenders see a higher credit loss factor, reducing appraised NOI and loan proceeds
Watch Out
Confusing bad debt with vacancy. A vacant unit produces zero income. Bad debt is income you counted but will not receive. They look similar in your P&L but have different causes and solutions.
Skipping the write-off. Carrying uncollectable receivables overstates your assets and income, which can mislead you or future buyers about actual property performance.
Ignoring the FIRE movement math. Investors pursuing financial independence through rental income — including those on coast FIRE or barista FIRE paths — often model income from rental portfolios. If bad debt assumptions are too optimistic, projected passive income is overstated, which can delay or derail a safe withdrawal rate plan. The classic four percent rule assumes reliable income; a landlord depending on rent must account for realistic credit loss.
Using outdated benchmarks. Bad debt norms shift with the economy. Pandemic-era eviction moratoriums caused bad debt to spike well above historic averages in many markets. Model your underwriting with current data, not pre-2020 comps.
Assuming the security deposit covers everything. In many states, security deposits are capped at one or two months of rent. A tenant who owes four months of back rent leaves you exposed even after the deposit is applied.
The Takeaway
Bad debt is an unavoidable cost of being a landlord. The best investors treat it as a quantifiable operating expense — not a surprise — by screening tenants rigorously, applying a realistic credit loss factor in their underwriting, and using accrual accounting to capture the tax offset. Keep your bad debt rate below 2% of gross scheduled rent, and you are running a tight operation. Let it creep above 4%, and you have a systemic problem that no refinance or rent increase will fix on its own.