How to Know When to Use a Discount vs. Write-Off in Law Firm Billing | RunSensible

Knowing when to use a discount vs. write-off in law firm billing helps keep invoices clearer, billing records more accurate, and internal decisions easier to explain later. In simple terms, use a discount when you are intentionally reducing the amount before or during billing. Use a write-off when a bill, or part of a bill, has already been issued, and the firm has decided the remaining balance will not be collected.

That difference matters because the two actions represent different business decisions. A discount is usually pricing-related. A write-off is usually collection-related.

The Problem: Discounts and Write-Offs Are Easy to Confuse

Many firms reduce client bills for practical reasons. A partner may approve a courtesy reduction. A billing team may apply a fixed promotional discount. A client may dispute part of an invoice. Or a bill may sit unpaid long enough that the firm decides to stop pursuing the remaining balance.

Those situations may all reduce the amount the firm expects to receive, but they should not always be handled the same way.

When discounts and write-offs are used interchangeably, firms can lose clarity around why revenue was reduced. Was the invoice intentionally lowered before it went out? Was the client given a courtesy adjustment? Was the amount billed but later deemed uncollectible? Those are different billing events, and the records should reflect that difference.

Use Case Scenario: A Firm Needs Cleaner Billing Adjustments

A small law firm sends monthly bills for client matters. Some bills include approved reductions before they are sent because the firm wants to offer a client-specific discount. Other bills become overdue after repeated reminders, and the firm eventually decides that part of the balance is unlikely to be collected.

The billing administrator needs a consistent rule:

Use a discount when the firm is reducing the amount as part of the billing process.

Use a write-off when the billed amount remains unpaid, and the firm decides to remove it from accounts receivable.

This helps the team explain billing changes internally, keep client-facing invoices cleaner, and maintain a more transparent record of financial decisions.

The Solution: Treat Discounts and Write-Offs as Separate Billing Decisions

RunSensible supports both workflows, but they serve different purposes.

A discount can be created as a dollar amount or percentage and applied to an invoice or quote. Discounts may be applied either per item or to the transaction as a whole. In a bill workflow, users can also apply discounts to timesheets by creating a discount for that bill or selecting an existing discount from the discount list.

A write-off is used for uncollectible bills. RunSensible’s write-off workflow allows the user to acknowledge that part or all of a bill will not be collected, remove that uncollectible balance from accounts receivable, enter a write-off date and description, distribute the write-off across accounts, and keep a history of prior write-offs.

When to Use a Discount

Use a discount when the reduction is intentional and part of the pricing or billing decision before the amount is treated as uncollectible.

Common examples include:

A courtesy discount is approved before sending the bill.

A percentage reduction on a specific line item.

A flat dollar reduction on an invoice or quote.

A negotiated reduction before the client receives the final bill.

A discount is applied to the full transaction rather than one item.

In RunSensible, discounts can be created in the Tax/Discount area, where users can enter a name and value as either a percentage or a dollar amount. Discounts can then be applied to invoices or quotes per item or to the full transaction through the documented invoice and quote workflow.

For bills, RunSensible also supports applying discounts directly to timesheets. A user can create a new discount for the current timesheet or select from existing discounts configured in the discount management tab.

When to Use a Write-Off

Use a write-off when the bill has already been issued, and the firm has decided that some or all of the remaining balance will not be collected.

Common examples include:

A client will not pay the remaining balance.

The firm has decided to stop pursuing an old receivable.

A disputed amount is being removed after billing.

Only part of the bill is collectible.

The full balance needs to be removed from accounts receivable.

In RunSensible, the Write-Off button is designed for uncollectible bills. The workflow allows the user to enter the date of the write-off, add a description explaining the reason, review the bill’s original amount, payments, prior write-offs, and remaining balance, then enter the amount to write off.

If the entire remaining bill amount is written off, the bill status updates to Paid. If only part of the amount is written off, the status updates to Partially Paid. RunSensible also keeps a write-off history so the firm can review prior adjustments later.

Step-by-Step: Discount vs. Write-Off Decision Guide

1. Ask whether the bill has already been finalized or sent

If the bill is still being prepared, a discount is usually the better fit. The firm is deciding what amount to charge before the billing process is complete.

If the bill has already been issued and the unpaid balance is no longer expected to be collected, a write-off is usually the better fit.

2. Identify the reason for the reduction

Use a discount when the reason is pricing-related: courtesy, promotion, negotiated fee reduction, or approved adjustment before billing.

Use a write-off when the reason is collection-related: uncollectible debt, unpaid balance, disputed receivable, or a business decision to stop pursuing payment.

3. Decide whether the reduction should appear as part of the invoice

A discount belongs inside the invoice or quote calculation. RunSensible allows discounts to be applied at the item level or across the full transaction.

A write-off happens after the balance exists. It is not simply a pricing reduction; it is a record that the firm no longer expects to collect part or all of the receivable.

4. Record enough detail for future review

For discounts, use clear discount names and values so staff understand what was applied.

For write-offs, RunSensible allows users to add a date, description, account-level changes, and notes. This helps preserve the reason behind the write-off and supports a clearer internal history.

5. Review the bill status after the adjustment

A discount affects the amount being billed.

A write-off affects the unpaid balance. In RunSensible, a full write-off changes the bill status to Paid, while a partial write-off changes it to Partially Paid.

Outcome

A clear discount vs. write-off process helps law firms reduce billing confusion and maintain cleaner records. Staff can understand whether a reduction was a pricing decision or a collection decision. Partners can review billing adjustments with more context. Clients receive bills that better reflect intended charges. And the firm’s receivables stay more accurate when uncollectible balances are handled through a dedicated write-off workflow.

This does not replace accounting review or firm-specific financial policies, but it gives legal teams a more structured way to manage common billing adjustments.

If your firm needs a more consistent way to handle invoice discounts and uncollectible balances, RunSensible supports both workflows inside its billing tools. You can apply discounts during billing and use write-offs when a billed amount is no longer expected to be collected.

FAQs

What is the main difference between a discount and a write-off?

A discount reduces the amount being charged as part of the billing process. A write-off removes part or all of an unpaid bill balance after the firm decides it will not be collected.

Should I use a discount for a client courtesy reduction?

Usually, yes. If the firm is intentionally reducing the price before or during invoice preparation, a discount is the cleaner billing action.

When should I write off a bill?

Use a write-off when the bill has already been issued, and the remaining balance is considered uncollectible or no longer worth pursuing.

Can RunSensible apply discounts by percentage or dollar amount?

Yes. RunSensible supports discounts in percentages or dollar amounts, and discounts can be applied per item or to the full transaction.

What happens when I write off the full remaining bill balance in RunSensible?

When the full remaining amount is written off, RunSensible updates the bill status to Paid. If only part of the bill is written off, the status changes to Partially Paid.

Final Thought

Discounts and write-offs both reduce what the firm expects to receive, but they should not be treated as the same billing action. A discount explains a pricing decision before or during billing. A write-off explains a collection decision after a balance remains unpaid. Keeping that distinction clear helps law firms maintain better billing visibility, cleaner receivable records, and more consistent internal review.

Help Center Links

• Add tax or discounts to an invoice or quote – https://help.runsensible.com/how-to-add-tax-discounts-to-an-invoice-or-quote/
• Create a bill and apply discounts to timesheets – https://help.runsensible.com/billing/creating-a-bill/
• Manage bill, tax, and discount settings – https://help.runsensible.com/billing/bill-tax-discount-management/
• Use the write-off button for uncollectible bills – https://help.runsensible.com/billing/using-the-write-off-button-for-uncollectible-bills/