What is the difference between an open invoice and a past-due one?

An open invoice is any bill that hasn't been paid, including those that aren't due yet. A past-due invoice is a specific type of open invoice where the payment deadline has already passed. You should treat all past-due invoices as open, but you won't treat all open invoices as past-due. Tracking both categories helps you forecast future cash arrivals versus immediate collection needs.

Does an open invoice affect my business taxes?

It depends on whether you use cash or accrual accounting. Most small businesses use cash accounting, meaning you only pay taxes on income after the invoice is closed and the money is in your bank. Under accrual accounting, you report the income as soon as the invoice is sent, meaning an open invoice can create a tax liability before you've actually received the funds. Consult with a CPA to determine your specific reporting requirements.

Why does an invoice remain open after a partial payment?

The accounting system keeps the document open until the total balance is $0. If you sent a $5,000 bill and received $3,000, the remaining $2,000 is still an outstanding obligation. This ensures you don't lose track of the remaining debt. Once the final installment arrives, the status changes to closed. Keeping it open prevents manual errors and protects your revenue trail for future audits.

How long should I keep an invoice open before writing it off?

Most businesses wait 90 to 120 days before considering an open invoice for a bad debt write-off. You'll generally follow a collection escalation process involving email reminders and phone calls first. Writing off an invoice means you accept the loss and remove it from your assets. This is usually the final step after all other recovery attempts fail. It shouldn't be done lightly as it directly reduces your business's reported profit.

Can I edit an open invoice once it's been sent?

You can edit an open invoice, but it's often better to issue a credit note if the value changes. Changing a document that the client already has in their records causes confusion during reconciliation. If you must edit it due to a typo or mistake, ensure you notify the client and provide the updated version immediately. This maintains an accurate audit trail and prevents payment delays caused by conflicting documentation between both parties.

Blog

Open Invoice Management: Definitions and Cash Flow Strategy

Published December 24, 2025

4 min read

Open Invoice Management: Definitions and Cash Flow Strategy

The Lifecycle of an Open Invoice Financial Risks of Unpaid Documents Strategies to Close Invoices Faster Key Takeaways Frequently Asked Questions

87% of businesses are paid past their original due date (Chaser, 2022). Every unpaid document becomes an open invoice, representing revenue that's earned but legally unavailable for use. This guide details the lifecycle of an open invoice and provides metrics to convert these receivables into liquid capital.

The Lifecycle of an Open Invoice

An open invoice is any bill issued to a client that hasn't been paid in full yet. It's an asset on your balance sheet under Accounts Receivable, even if the funds aren't in your bank account. Technically, all invoices start as "open" the moment you send them to a customer.

The document stays open until the customer finishes the transaction or you write it off as bad debt. If a client owes you $5,000 but only pays $2,500, that invoice remains open for the remaining balance. Tools like PineBill track these partial payments automatically to ensure your ledger stays accurate.

Invoice Status	Payment Deadline	Internal Impact
Open	Before or on Due Date	Projected Cash Flow
Overdue	Past Due Date	Liquid Crisis Risk
Closed	Transaction Complete	Realized Revenue
Written Off	Non-collectible	Asset Loss

Source: Tipalti, 2024

Financial Risks of Unpaid Documents

More than half of business owners spend over four hours every week specifically chasing late payments (Chaser, 2022). That's time you won't get back for business development or project execution. When open invoices pile up, your business faces significant liquidity risks.

Manual invoice processing costs an estimated $12 to $15 per document due to data entry and human error (Tipalti, 2024). If you're managing 50 open invoices, you're potentially losing over $600 in administrative overhead alone. Platforms like PineBill reduce this cost by automating the tracking and reconciliation process.

A flowchart showing the process from invoice generation to payment reconciliation for open invoices.

Strategies to Close Invoices Faster

Closing an invoice requires moving it from your aging report to your cleared bank feed. You don't have to wait for the client to remember—proactive systems change behavior. Using clear terms like "Net 15" or "Due on Receipt" helps set expectations early.

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Consider offering a 2% discount if a $8,500 invoice is paid within ten days. While it's a small hit to your margin, it's often cheaper than the cost of a business line of credit. Integrating PineBill with your bank feeds identifies matching transactions instantly, so you'll know exactly when an open status becomes closed.

Key Takeaways

Open Status Defintion—An invoice stays open until the balance reaches zero or is officially written off.
Tracking Cost—Chasing unpaid bills costs businesses up to 4+ hours of administrative time weekly.
Partial Payments—Partial payments keep an invoice open even if some cash has been received.
Status Verification—Automated reconciliation reduces the $15-per-invoice cost of manual processing.
Aging Reports—Categorizing open invoices by age helps prioritize collection efforts.

Frequently Asked Questions