Invoice Finance for Plumbing & Heating Contractors

Commercial plumbing and heating contractors face the same cash flow squeeze as other construction trades: materials (boilers, radiators, pipework, copper) cost thousands upfront, labour is paid weekly, and the main contractor pays your application 45-60 days after the work is done. On a commercial heating installation worth £30,000-£80,000, you could be £20,000-£50,000 out of pocket for two months. Construction factoring bridges that gap.

Commercial vs Domestic

Invoice finance only covers commercial (B2B) work — plumbing for main contractors, property developers, housing associations, commercial buildings, schools, hospitals. If you do a mix of domestic and commercial, the provider finances the commercial invoices and excludes the domestic ones.

If you're primarily a domestic plumber doing boiler installations for homeowners, invoice finance won't work — those are B2C transactions. For domestic work, look at merchant credit accounts or business loans instead.

The Material Cost Problem

Plumbing and heating is one of the most materials-heavy trades. A commercial boiler is £3,000-£15,000. Underfloor heating for a commercial building can be £20,000+ in materials alone. Copper pipe prices have risen 40% since 2020. You're paying merchants upfront or on 30-day account, but the main contractor pays you on 60-day terms.

With invoice finance, you submit your application for payment to the main contractor, then hand a copy to the factoring provider. They advance 80-90% within 24-48 hours. That covers your next materials order and next week's wages.

Gas Safe and Certification

Being Gas Safe registered (mandatory for gas work) and holding relevant certifications (OFTEC for oil, MCS for renewables) helps your factoring application. It signals to the provider that you're qualified and compliant — reducing their risk assessment. Mention all certifications when applying.