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Free guide: 90-day blueprint to transform your accounts receivable process

Late payment calculator: Calculate interest on an unpaid invoice


Unpaid invoices can ruin your cash flow and endanger your company's stability. Calculating late payment interest is key to getting back what you're owed and stopping future delays from happening.

Our free UK late payment calculator instantly computes statutory interest and compensation fees based on current legal rates. With this powerful tool, you can quickly calculate the interest on late payments, making it much easier to recover those outstanding debts.

By offering clear and precise interest calculations, the calculator helps you effectively recover debts and apply appropriate late fees, ensuring you collect everything that's due to you.

Chaser late payments calculator



The debt of
100
was due on
1-Jan-2021
but was paid
365
days late on
01-Jan-2022
.

The interest due to you is 8.10

How to calculate late payment interest using this late payment calculator?

Late payment interest is an additional fee charged on outstanding invoices that have surpassed their due date. It's a way to compensate businesses for the delay in receiving payment and to encourage prompt settlement of invoices.

Here's a breakdown of how to calculate late payment interest using this late payment calculator:

Input required information

  • Invoice amount: The original total amount due on the invoice.
  • Interest rate: The percentage rate specified in your contract or by law for late payments.
  • Invoice date: The date the invoice was issued.
  • Due date: The date the payment was originally due.
  • Payment date: The date the payment was actually made (or the current date if the payment is still outstanding).

Automatic calculation

  • The calculator will use the inputted information and a formula to automatically calculate the interest accrued on the overdue invoice. The formula typically involves multiplying the outstanding balance by the interest rate and the number of days the payment is late.

Review and update invoice

Carefully review the calculated interest amount to ensure its accuracy. If the amount is correct, add it to the original invoice total to update the amount the customer now owes.

Additional considerations

  • Compound interest: Some calculators may offer the option to calculate compound interest, where interest is charged on both the original amount and the accrued interest.
  • Payment terms: Review your payment terms and the applicable laws to ensure you're charging a fair and legal interest rate.
  • Communication: Clearly communicate the late payment interest charge to your customer, explaining how it was calculated and the updated invoice total.
  • Dispute resolution: Have a process in place to handle disputes regarding late payment interest charges.

How to implement a late fee policy

Implementing a late fee policy is crucial for businesses looking to enhance cash flow and minimize overdue invoices. Follow this step-by-step guide to establish your policy effectively:

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1. Review existing contracts  

Examine your current contracts with clients for any pre-existing late fee agreements. Ensure that any new changes you make are in compliance with legal standards and align with contractual commitments to avoid any future disputes.

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2. Update terms and conditions  

Create a straightforward late payment clause that clearly outlines the interest rate, the method for calculating interest, and the conditions under which late fees will apply. Present the interest rate in both numerical and percentage formats for greater transparency. Include the legal reasoning for the charges, whether it is per law or mutual agreement, to avoid misunderstandings.

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3. Modify your invoice template  

Add the late payment clause into your invoice template, positioning it ideally near the payment terms section for easy visibility. Use clear and concise language to ensure clients fully understand the terms, reducing the chance of disputes.

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4. Determine fee application timing  

Decide on an appropriate grace period before late fees begin to accrue, commonly ranging from 15 to 30 days after the due date. Determine whether interest will be applied on a fixed monthly date or based on the actual number of days the payment is late.

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5. Communicate with clients 

Inform clients about the new or revised policy well before its implementation. Clearly explain the reasoning behind the policy to encourage client understanding and compliance, fostering a positive business relationship.

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6. Implement a tracking system  

Utilize accounting software or CRM systems to meticulously monitor invoice send dates, due dates, and payment records. Set up automated reminders for overdue accounts to maintain consistency and timely communication with clients.

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7. Prepare for disputes  

Develop a standard procedure for resolving any client disputes regarding late fees. Be open to dialogue to settle disagreements amicably but remain firm on your policy to ensure fairness and maintain your business's credibility.

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8. Evaluate and adjust 

Regularly assess the policy's effectiveness in improving cash flow and client relations. Be prepared to modify the terms based on feedback and the evolving needs of your business to continually enhance your approach.

By following these steps, your business can better manage late payments, improve cash flow, and maintain strong client relationships.

What to do after calculating late payment interest

Once you have calculated the late payment interest on an overdue invoice, it's crucial to take systematic steps to ensure the process is handled professionally and efficiently. Below are the recommended actions:

1. Issue a new invoice

  • Incorporate late fees: Generate a new invoice that includes the calculated late payment interest and any compensation fee if applicable. Ensure that these charges are clearly itemized to avoid any confusion.
  • Update invoice details: Ensure the invoice highlights the original amount due, the accrued interest, total fees, and the new invoice total. This transparency will help communicate the need for timely payment.
  • Legal compliance: Check that your application of interest and fees complies with the relevant legal frameworks or mutually agreed terms with the client to protect your business from disputes.

2. Send the invoice with a professional email

Craft the late fee clause: Include a late fee clause in your invoice template that outlines the interest rates and conditions under which they apply. Provide this information in a visible section of the invoice for clarity.

Sample professional email:

Subject: Updated Invoice # [Invoice Number] - Including Late Payment Fees

Dear [Client's Name],

I hope this message finds you well. Please find attached the updated invoice #[Invoice Number], which includes a late payment interest of [Interest Amount] and a compensation fee as per our agreed terms.

Kindly review the invoice and arrange for the outstanding balance to be settled by [New Due Date]. Should you have any questions or require further clarification, feel free to get in touch.

Thank you for your understanding and cooperation.

Best regards,

[Your Name]  

[Your Position]  

[Your Company]  

[Contact Information]

  

3. Record the transaction in your accounting system

  • Update records: Enter the updated invoice details into your accounting system. This includes adjusting the invoice amount to reflect the added interest and compensation fees to maintain accurate financial records.
  • Track payments: Set up a follow-up schedule to monitor payment receipt based on the new due date.

4. Utilize automated email reminders and ARC

Accounts Receivable Conversion (ARC) and automated email reminders significantly boost prompt payments by speeding up fund availability and providing scheduled automated reminders.

Let’s take a closer look at their benefits:

Accounts receivable conversion 

ARC turns paper checks into electronic payments, speeding up fund availability. This improves cash flow and reduces outstanding invoice times.

Automated email reminders

Automated email reminders, especially with accounting software, provide consistent payment reminders. They reduce manual effort and errors by:

  • Sending timely notifications: Reminders go out before, on, and after due dates, keeping clients informed.
  • Maintaining professionalism: Customized reminders ensure consistent, polite communication.
  • Reducing administrative burden: Freeing up staff time from manual follow-ups.
  • Improving consistency: Every client gets reminders on schedule, preventing oversights.

Together, ARC and automated reminders cut late payments, improve cash flow, and foster better client relationships.

For example, a business using Chaser can automatically send polite email reminders to clients a few days before an invoice is due, on the due date, and then with a late fee added if payment is missed. 

Simultaneously, if a client sends a physical check, ARC quickly converts it into an electronic payment, drastically reducing the time it takes for funds to clear compared to traditional banking processes. 

A combined approach significantly reduces manual effort, minimizes errors, and ensures consistent, timely follow-up. This not only leads to quicker cash flow and improved client relationships, but also sets the stage for a seamless transition into optimizing your reminder process. Let's now explore how to automate your payment reminders to achieve these benefits more efficiently.

Automate your payment reminders and late fees

Tracking invoices by hand is slow, error-prone, and bad for your money flow. Mistakes cost you, and late payments stop your business from growing.

Tools like Chaser automate this process. It handles your invoices easily and automatically. Chaser sends friendly reminders to clients, which means fewer late payments and better relationships.

This automation helps money come in on time, keeping your finances steady. By making invoice management simple and reducing errors, Chaser lets businesses focus on growing, turning a difficult task into a valuable asset.

Wrapping it up

Having a friendly and effective payment reminder setup is key to keeping your money flowing smoothly and building great relationships with your clients. 

By throwing some automation into the mix, businesses can gather payments faster and with less hassle, all while keeping things courteous and professional. This approach doesn't just help get those payments in on time; it also keeps your customers happy and coming back. 

Why not check it out yourself? Give Chaser's email reminder system a spin for 10 days on the house, and see what a game-changer it can be for managing those invoices and strengthening your ties with clients.

FAQs

What is a past due invoice interest calculator?

A past due invoice interest calculator is a tool that helps businesses determine the amount of interest to charge on overdue invoices. By inputting details such as the original invoice amount, due date, and the applicable interest rate, this calculator automatically computes the interest owed on late payments. This ensures accurate billing and aids businesses in enforcing their payment terms.

What is the current statutory interest rate for late commercial payments?

The statutory interest rate for late commercial payments can vary by country or region. In many places, it is set at a certain percentage above the base or reference interest rate. For example, in the European Union, it is often set at the European Central Bank's reference rate plus 8%. It's important to check the specific regulations applicable to your jurisdiction for the exact rate.

Can I charge late fees if it wasn't in my original contract?

Charging late fees only becomes enforceable if it was stipulated in the original contract. Without such a clause, applying late fees retrospectively can lead to disputes or damage client relationships. It's advisable to include clear terms regarding interest on late payments in contracts to protect your business interests.

What is the difference between ARC and BOC?

ARC and BOC (Back Office Conversion) are both processes used to convert paper checks into electronic transactions. ARC applies to checks received by mail or dropbox, converting them at the time of receipt. BOC, on the other hand, applies to checks received in a retail or back-office environment, often converted at a later stage. Both methods streamline check processing but differ in their application settings.

What should I do if a customer disputes the late fee?

If a customer disputes a late fee, it's important to approach the situation professionally and diplomatically. Review the terms of the original contract to ensure the fee is justified. Communicate openly with the customer to understand their concerns and try to reach a resolution. It might involve waiving or negotiating the fee, especially if maintaining the customer relationship outweighs the fee collection.

How do I handle bounced checks under ARC?

When dealing with bounced checks under ARC (Accounts Receivable Conversion), it's critical to have a clear policy in place. You should notify the customer immediately, explaining the situation and any fees incurred due to the bounced check. Consider offering alternative payment methods to facilitate settlement. Implement measures to prevent future occurrences, such as setting up electronic payment options or requiring pre-authorized payments.