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April 25, 2025
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How to Send an Invoice: A Step-by-Step Guide

This guide walks you through how to create and send professional invoices step by step—via email or online—to ensure timely payments. Learn how clear invoicing practices, secure payment methods, and tools like Tofu can improve cash flow and reduce delays.

Managing your finances effectively starts with knowing how to create and send invoices. Whether you're a freelancer, small business owner, or contractor, proper invoicing helps you get paid fast and strengthens client relationships. While the invoicing process has evolved from paper checks to digital solutions, many still face delays and errors.

Neglecting invoicing can lead to cash flow problems and frustrated clients. A well-structured invoice should include clear payment terms, accurate details, and multiple invoice payment options. By mastering this process, you'll confidently manage invoices and ensure smooth transactions.

This guide will show you how to write an invoice, send it professionally, and track payments efficiently. By following these steps, you’ll streamline payment processing and minimize follow-ups.

Key Takeaways:

What Is an Invoice and Why Is It Important?

An invoice is a formal document sent to clients to request payment for goods or services. It acts as a legal record of a transaction and plays a key role in tracking finances and resolving disputes. Without proper invoices, businesses risk delays or lost payments. If you're trying to get a better handle on the invoicing process, it helps to understand how invoices are created, sent, and managed effectively throughout the payment cycle.

Every invoice must include specific invoice details to be valid. Here’s what matters most:

Using a structured template ensures all required fields are included. Missing key details, such as the invoice number, may halt the invoice processing and delay payments. Professional invoices also simplify tax reporting and audits, enhancing business credibility.

Preparing to Send an Invoice: Essential Information to Include

Creating an invoice needs careful attention to detail. This ensures clarity and professionalism. Whether you’re starting from scratch or using an invoice template, some details are crucial. Here’s how to structure each part effectively.

Invoice Number and Date

Every invoice must have a unique number. This helps track payments. You'll want to include the invoice due date and issue date to avoid confusion.

Example:
"INV-001 | Issued: 01/15/2024 | Due: 02/15/2024."

Client and Business Details

All invoices need to include the following:

Itemized List of Products or Services

List every item with clear descriptions. A table helps organize details:

Item Description Quantity Rate Subtotal
Website Design Custom homepage and three subpages 1 $1,500 $1,500
Chrome Extensions Social Chrome extension app 1 $2,000 $2,000

Payment Terms and Methods

Outline clear payment terms:

A person using a laptop with financial analytics and invoicing data on the screen.

When to Send an Invoice: Timing for Faster Payments

Knowing when to send invoices is key to getting paid on time. Approximately 55% of all invoices issued in the United States are paid late. This poses a big challenge for businesses. In order to avoid the hassle of chasing unpaid invoices, understand the timing of sending invoices. Think about your business needs and what’s common in your industry. It will help keep your funds steady.

Sending an Invoice Before Work Begins

For deposits or retainers, create and send an invoice upfront. This is good for projects that need upfront payment for materials or partial work. It helps you get funds early and lowers the risk of unpaid services.

Sending an Invoice After Work Is Completed

Many businesses deliver their invoices after finishing the work. Send it right away to keep things running smoothly. Use clear payment terms like net-15 or net-30 to encourage clients to pay quickly. Waiting too long can lead to late payments.

Industry-Specific Invoice Timing

Industry Recommended Timing Example
Contractors Weekly or after project phases Progress billing for construction projects
Electrical Upon project completion Final invoice after electrical work is done
Plumbing At project milestones or end Invoice sent after plumbing installation
HVAC After installation or service Invoice issued post-HVAC system installation
Construction At each project phase Progress payments throughout the project
Freelancers Within 24 hours of delivery Invoicing after project milestones

Following industry norms helps ensure invoices are paid on time. Freelancers can send theirs weekly to balance efficiency and reminders. Contractors might use retainers to avoid late payments. Each approach matches how you get paid with what clients expect.

How to Send an Invoice (Step-by-Step Process)

Learn how to send invoices efficiently with this guide. Follow these steps for clear and professional transactions.

1. Understand Your Client's Invoicing Process

Check if your client has specific invoicing requirements, such as purchase order numbers or payment approval steps.

2. Prepare and Review the Invoice

Before sending, double-check all details. Make sure payment terms, itemized charges, and contact info are correct.

3. Send the Invoice

Pick the best way to send the invoice based on what your client prefers. Here’s how to make each method work best:

4. Follow Up on the Invoice

Send polite reminders 7-10 days after sending an invoice to clients. Use subject lines like "Payment Reminder: Invoice #123."

Common Mistakes to Avoid When Sending an Invoice

Errors in invoicing can lead to invoices not getting paid and strained client relationships. Avoid these pitfalls to ensure smooth and reliable payments. Let's explore some of the most common mistakes,

Not Including Payment Details

Missing payment instructions like bank details or online portals cause confusion. Without clear steps, clients might delay payments. 

Using a professional invoice template can help you eliminate this issue. With Tofu's invoice templates, you can customize all your invoices to include the information needed. Then simply duplicate the format and send a new invoice.

Always remember to include bank account numbers, payment links, and deadlines directly from the invoice. Also specify preferred payment methods (e.g., PayPal, ACH)

Sending Invoices Late

Delaying an invoice to a client might push payments into future billing cycles. Clients may forget obligations if invoices arrive after agreed terms.

Set up automated reminders on or before the agreed dates. By automating your billing system you'll have consistent timings and will never send an invoice late.

Forgetting to Follow Up

Ignoring overdue invoices risks prolonged delays. Proactive outreach ensures clients prioritize payments. 

Sent a polite follow-up 7-14 days past due dates. Use email or phone calls for persistent delays.

Ignoring Security Measures

In today's digital world, consumers are cautious about scams and cyber threats. The Financial Times reported that AI-generated phishing scams are increasingly targeting corporate executives. These scams utilize advanced technology to craft highly personalized and convincing fraudulent emails, often using AI to gather extensive personal data from online profiles.

Using a secure invoicing tool protects both your financial data and your client’s sensitive information. Opt for invoicing software that includes security features like encryption, secure payment processing, and fraud detection to minimize risks.

Additional Pitfalls

Mistake Impact Solution
Inconsistent formats Confusion over terms or totals Use standardized templates
Unclear itemization Disputes over charges List dates, hours, and costs explicitly
Wrong contact details Delays from misdirected invoices Verify billing addresses before sending

Make it as easy as possible for clients to pay by double-checking details. It's always a good idea to review invoices before sending them to prevent these issues. Proactive steps ensure smoother financial management.

Final Thoughts on Sending Invoices

As a business owner, delivering invoices on time is key to keeping cash flowing. Use the Tofu app to send invoices with ease and track payments in one place—helping you get paid faster and avoid delays. Using invoicing software like Tofu helps you stay organized and reduce the risk of missed payments.

Secure payment options like ACH or debit protect your transactions. PayPal makes bank transfers easy, ensuring your finances stay strong.

Start small by using invoicing software to organize your invoices. By focusing on secure methods, you can improve your funds and gain your clients' trust.

Streamline your invoicing with templates made for construction, trades, and freelancers. Try Tofu today.

FAQ

What is an invoice?

An invoice is a formal document that outlines the details of a transaction. It requests payment for goods or services provided. It serves as an official record for both parties.

Why is proper invoicing important for my business?

Proper invoicing helps maintain a steady cash flow. It builds trust with clients and provides protection in payment disputes. It also ensures accurate records for tax and accounting.

What information should I include on an invoice?

A professional invoice should include your unique invoice number and the invoice date. It should also include your and your client’s contact information. An itemized list of products or services, payment terms, and available payment methods are also necessary.

When should I send an invoice?

The timing of sending an invoice can impact payment speed. You can send it before starting work to secure a deposit. Or after completing the work when payment may be due. Choose the best time based on your project's specifics.

How can I make sure my invoices get paid faster?

To get paid faster, ensure accuracy in your invoices. Send the invoices directly to your clients, promptly upon completion or delivery of services. Follow up with reminders. Offering multiple payment options can also help.

How can I automate my invoicing process?

You can automate your invoicing by using accounting software or invoicing tools. These tools allow you to set up recurring invoices, schedule sends, and generate invoices automatically based on your sales or services.

With Tofu, you can customize invoice templates to match your brand, set up reminders, and deliver your invoice via email or in person.