Diagnosing your cash flow before it gets tight
Spotting the items that drain your cash (materials, subcontracting, deposits)
When cash flow gets tight, it's not that quotes are lacking, it's the gap between expenses and payments received. List, job by job, what goes out before it comes back in. Materials paid upfront, subcontracting paid at 30 days, rentals, fuel. Also check your deposits. Are they high enough, and collected before you place the order?
Measuring your actual payment terms: DSO, client and supplier delays
Measure your actual delays. DSO (days sales outstanding) is the average number of days it takes to collect on your invoices. Track three simple figures every week. Invoices issued, invoices collected, invoices overdue. On the supplier side, note your due dates and what you can spread out without stalling your jobs.
Building a simple 8-to-12-week forecast to steer day to day
Build a table over 8 to 12 weeks. One column per week, two rows. Expected inflows (deposits, progress payments, final payments) and expected outflows (wages, overhead, suppliers, subcontracting). Update it every two days. A rolling forecast quickly shows you the at-risk weeks and helps you act before the cash gap hits.
Securing payment from the quote and the start of the job
Setting deposits and payment milestones suited to the length of the works
To protect your cash flow, plan for a deposit as soon as the quote is signed, then a schedule tied to actual progress. On a long job, an initial payment can cover the materials order, followed by milestones at the end of each phase (demolition, insulation, commissioning), and a final payment at handover.
Writing clear payment terms: penalties, compensation, due dates
State the due dates, accepted payment methods, and what happens in case of delay, in black and white. Between businesses, think about penalties and the flat-rate collection fee. With an individual client, specify the follow-up process and, if needed, the applicable interest. A simple written agreement avoids arguments at the worst possible moment.
Getting the documents that prevent blockages: sign-off, work order, certificates
Before starting, get a dated and signed quote marked approved for work. If a client requires it, ask for a work order. Attach the useful certificates (public liability, professional indemnity, your registration if relevant, and the VAT relief declaration). These documents unlock invoicing and reassure the client.
Organizing invoicing and follow-ups without wasting time
Setting up an invoicing process: progress billing, interim invoices, final payment
Set up simple tracking from the signed quote onward. Break the job into milestones. At each completed stage, send a progress invoice, or an interim invoice, with the percentage completed, the due date, and supporting documents. The final invoice goes out after handover. You protect your cash flow without chasing information. That follow-up is easier when the signed quote becomes a compliant invoice, sent to the client and to accounting without re-entry.
Following up at the right time: schedule, proof of sending, and a professional tone
Set a follow-up schedule. A reminder before the due date, then a follow-up at day 3 and day 10, before a notice of default if needed. Keep clear proof of sending. Timestamped email, client portal, registered mail on paper or electronic. Stay factual, polite, and state one single expected action.
Handling disputes and retentions: reservations, handover, report, and lifting of reservations
In case of disagreement, rely on the handover. Draft a dated and signed report, with specific reservations, then schedule the lifting of those reservations. Once the lifting report is signed, you secure payment of the final balance and limit the retentions that hold up your collections.
Reducing cash-flow tension linked to grants and payments in renovation
Anticipating payment delays around the funding: points of vigilance for 2026
In 2026, the grant is generally paid out after the works are completed, and the obligated supplier settles after a complete file is submitted. To protect your cash flow, set a precise schedule in the quote. Deposit, interim payments, final payment at handover. Also lock down the home's eligibility, your registration, and the completeness of the documents to avoid a blocked file. To go further, see our advice on avoiding a blocked file. The gap can also be closed on the client's side, with partner lenders that pre-finance the grants and build the file from the quote.
Synchronizing orders and installation to limit cash advances
Avoid buying all the materials before the necessary approvals are in. Reserve the products, then place the order once the job date is confirmed and the client has given their agreement. Timed procurement reduces tied-up stock, especially for heat pumps and insulation materials with variable lead times.
Negotiating with your suppliers: due dates, installment plans, returns, and credit notes
Ask for payment terms aligned with your collection schedule, and installment plans on large purchases. Agree in writing on returns, taking back surplus, and credit notes. You keep some breathing room without sacrificing the quality of the job.
Protecting your cash flow on at-risk jobs and in case of non-payment
Selecting jobs: warning signs, exposure caps, and solvency checks
Before signing, keep an eye on your cash flow. Be wary of clients who refuse the deposit, keep changing the scope, or have no clear financing. Set an exposure cap per client, and secure the start of the job with a suitable deposit.
- Dated, signed quote, with schedule and payment terms.
- ID and address verification. For a company, a Kbis extract and the authorized signatory.
- If grants are involved, ask for proof of submission and any missing documents.
Using the right tools: notice of default, payment order, insurance
If payment is late, move quickly to writing. A notice of default by registered letter with a specific deadline sets the tone for what follows. Without a response, a payment order is a useful procedure for straightforward invoices. Also consider legal protection insurance, and, in B2B, credit insurance.
Formalizing the end of the job: handover, delivery of documents, and final payment
Close things out properly. Hold a handover with a report, reservations if needed, and a date for their lifting. Deliver the expected documents (invoice, manuals, warranties, grant-related certificates) against payment of the final balance, under the terms set out in the quote.
