About this Medical Billing Write-Off Calculator
Write-offs can represent contractual adjustments, courtesy reductions, bad debt, or unresolved balances. This calculator separates basic write-off components for claim review.
Who this calculator is for
- Payment posters.
- Billing managers reviewing adjustments.
- Revenue cycle analysts reconciling expected reimbursement.
When to use it
- Estimate contractual write-off from charge and allowed amount.
- Calculate remaining variance after payments and responsibility.
- Separate courtesy adjustment from contractual adjustment.
How to use this calculator
- Enter billed charge and allowed amount.
- Enter insurance payment and patient responsibility.
- Add courtesy adjustment if applicable.
- Review contractual and remaining write-off values.
Key assumptions
- Allowed amount should not exceed billed charge for the contractual write-off output.
- Adjustment classification depends on organizational policy.
- Inputs are local only.
Accuracy and testing
Review formula sources, default test cases, assumptions, unit handling, rounding rules, and changelog for this calculator.
How this calculator works
Contractual write-off = billed charge - allowed amount. Remaining write-off = allowed amount - insurance payment - patient responsibility - courtesy adjustment.
Contractual write-off = billed charge - allowed amount. Remaining write-off = allowed amount - insurance payment - patient responsibility - courtesy adjustment. Total write-off = contractual + courtesy + positive remaining write-off.
Inputs explained
Billed charge
Original charge amount submitted or posted.
Allowed amount
Contracted payer amount after contractual adjustment.
Courtesy adjustment
Optional non-contractual reduction such as financial assistance or administrative adjustment.
Understanding your results
A remaining write-off above zero may indicate bad debt, charity adjustment, payment variance, or unresolved balance depending on policy.
Example scenarios
Claim posting
$1,000 charge and $650 allowed creates a $350 contractual write-off. If $500 insurance and $100 patient responsibility are posted, $50 remains to resolve.
Key Features
- Instant Calculation
- Private & Secure
- Mobile Optimized
Tips & Best Practices
- Keep contractual and non-contractual adjustment codes separate.
- Review negative remaining values as possible overpayment or data mismatch.
- Tie write-offs to approved reason codes.