What should a plumbing invoice include?

A plumbing invoice should include your business name, license number, contact info, customer details, invoice number, date, itemized services and materials, subtotal, tax, total, payment terms, and warranty information.

When should plumbers send invoices?

Send invoices immediately upon job completion or the same day. The sooner you invoice, the sooner you get paid. For larger projects, consider progress billing with invoices at each milestone.

How do plumbers handle late payments?

Set clear payment terms upfront (Net 15 or Net 30). Include a late fee clause (typically 1.5% per month). Send polite reminders at 7, 14, and 30 days past due. Consider offering early payment discounts to incentivize prompt payment.

Should I include my plumbing license on invoices?

Yes, always include your plumbing license number on invoices. It is required by law in most states and builds customer confidence in your professionalism and legitimacy.

Free Plumbing Invoice Generator

Create professional plumbing invoices with pre-filled line items for common services. Add your completed work, set payment terms, and download a polished PDF to send to your customer.

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Invoice Details

Invoice Number

Invoice Date

Due Date

Payment Status

Payment Terms

Your Business

Business Name

Phone

Customer

Customer Name

Address

Phone

Line Items

DescriptionQtyUnit PriceTotal

$1800.00

x$1800.00

$275.00

x$275.00

$175.00

x$175.00

$700.00

x$700.00

$500.00

x$500.00

$250.00

x$250.00

$85.00

x$85.00

Tax & Notes

Tax Rate (%)

Notes

Preview

Your Business

Plumbing Invoice

#INV-001

2026-04-12

Due: 2026-05-12

Water Heater Replacement (50 gal) - Completed x1$1800.00

Faucet Install - Completed x1$275.00

Drain Cleaning - Completed x1$175.00

Pipe Repair (per section) x2$700.00

Labor (per hour) x4$500.00

Materials & Supplies x1$250.00

Service Call Fee x1$85.00

Subtotal$3785.00

Total$3785.00

Payment Terms:

Payment is due within 30 days of invoice date.

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How to Create a Plumbing Invoice

A professional plumbing invoice ensures you get paid promptly and reduces disputes. Start with your business information, license number, and contact details at the top — this builds trust and looks professional.

List each service performed as a separate line item with the quantity, unit price, and total. If you replaced parts, include the part numbers or descriptions. Customers want to see what they paid for, especially on larger jobs.

Include clear payment terms: when payment is due (Net 15 or Net 30 is standard), accepted payment methods, and any late payment fees. Many plumbers now accept online payments, which speeds up collection significantly.

Add notes about warranty coverage — most plumbing work carries a 1-year labor warranty. This reassures the customer and demonstrates professionalism. Always keep a copy of every invoice for your records and tax purposes.

For recurring customers or service contracts, maintain consistent invoice numbering and keep records of past work. This makes it easy to reference previous jobs and builds long-term customer relationships.

Frequently Asked Questions

What should a plumbing invoice include?: A plumbing invoice should include your business name, license number, contact info, customer details, invoice number, date, itemized services and materials, subtotal, tax, total, payment terms, and warranty information.
When should plumbers send invoices?: Send invoices immediately upon job completion or the same day. The sooner you invoice, the sooner you get paid. For larger projects, consider progress billing with invoices at each milestone.
How do plumbers handle late payments?: Set clear payment terms upfront (Net 15 or Net 30). Include a late fee clause (typically 1.5% per month). Send polite reminders at 7, 14, and 30 days past due. Consider offering early payment discounts to incentivize prompt payment.
Should I include my plumbing license on invoices?: Yes, always include your plumbing license number on invoices. It is required by law in most states and builds customer confidence in your professionalism and legitimacy.

Need to create an estimate first? Use our free Plumbing estimate generator.