Plumbers

Plumbing invoicing software, built for the truck, not the office. BIG INVOICE is the invoicing app plumbers actually use on the job — no seat fees, no learning curve.

Why plumbers use BIG INVOICE

Plumbing work doesn't wait for office hours — and your invoicing shouldn't either. BIG INVOICE lets you create and send a professional invoice before you've even packed up your tools. Whether you're finishing a drain repair or wrapping up a full bathroom remodel, you can have a PDF in your client's inbox in under a minute. Start from our free plumbing invoice template or skip the template entirely and invoice straight from the app.

Quote before you dig

Estimates matter in plumbing. Material costs vary, job scope changes underground — a clear written estimate protects you and gives your client confidence. BIG INVOICE lets you write a detailed estimate, get approval, and convert it to an invoice when the work is complete. No re-entering data, no confusion.

Get paid on the day, not thirty days later

Late payments are the silent killer for small plumbing businesses. When you hand over a clear, professional invoice on-site, the conversation about payment happens face-to-face — and you get paid faster. BIG INVOICE is built to go with you to every job, so that conversation can happen every time.

Built for one-person shops and small crews

You're not a corporation. You're a plumber running a business between jobs. BIG INVOICE charges no seat fees, requires no onboarding, and gets out of the way. Your first 2 documents — invoices and estimates combined — are free, no credit card required. Pro is $5.99/mo or $59.99/yr for unlimited, once you need more than 2.

Plumbing invoicing — frequently asked

What should a plumbing invoice include?

Your license number (required in most states), a description of the work, materials and labor itemized separately, travel charges if you bill them, and clear payment terms. Our plumbing invoice template covers all of it.

Can I send a plumbing invoice from my phone, on-site?

Yes — that's the whole point. Tap, type, send. Your client gets a professional PDF before you've left the driveway.

Is BIG INVOICE free for plumbers?

Yes. You get 2 free documents to start — invoices and estimates combined, not a monthly reset — with everything else already unlocked: reports, unlimited clients, saved line items, PDFs. Once you've used those 2, Pro is $5.99/mo or $59.99/yr for unlimited documents.

How does a client actually pay a BIG INVOICE invoice?

Your invoice PDF includes your own Zelle, Venmo, Cash App, PayPal, check, or bank details as QR codes and links — your client pays you directly, the same way you already get paid. There's no in-app payment processing or fees taken out.

Is my business data private?

Yes — BIG INVOICE works fully offline. There's no account, no signup, and no cloud dependency. Your invoices, clients, and numbers stay on your phone.

Do I need to convert estimates to invoices manually?

No — write the estimate, get approval, and convert it to an invoice in one tap when the job's done. No re-entering data.