Inconsistent payment timing and unclear invoicing will bleed cash from your CNC millwork shop faster than a dull bit burns through walnut. Without discipline on the back end, even profitable jobs leave you scrambling to cover material costs and payroll. The right payment terms and invoicing system directly determines whether you're reinvesting profits or chasing clients for overdue balances.
Why Cash Flow Matters More in Custom Fabrication
CNC millwork projects often require upfront material purchases—hardwoods, hardware, finishing supplies—before you've invoiced a single dollar. A typical cabinet job for a residential contractor might tie up $2,000–$8,000 in material costs for 3–6 weeks. If your client pays net-60 after delivery, you're funding that gap yourself. Without planned payment structures, a busy shop can actually lose money despite high margins.
Set Clear Payment Terms Upfront
State your payment terms explicitly in writing before production begins. Standard approaches for CNC millwork shops include:
- 50% deposit upon order, 50% on completion or delivery – Common for custom projects; reduces your float risk and signals serious buyers
- Net-30 for repeat contractor clients – If you regularly work with general contractors or design firms, Net-30 (payment due within 30 days of invoice) is industry-standard, though enforce it strictly
- Net-15 for higher-volume or smaller jobs – Tighter turnaround reduces your carrying costs
- Prepayment for rush jobs or exotic materials – Non-negotiable if you're sourcing expensive stock like figured maple or walnut veneers
Include these terms on your written quote, order confirmation, and invoice. Many clients won't push back if expectations are clear from the start. If a client requests Net-60 or Net-90, price it in—add 2–4% to cover your financing cost and the risk of non-payment.
Structure Invoicing to Minimize Delays
Invoice immediately upon delivery or completion. Don't wait a week to send paperwork. Digital invoices cost you nothing and arrive instantly; physical invoices get lost in a contractor's pile. Include:
- Clear job name and project ID (tie it to your job tracking system)
- Itemized breakdown of work performed and materials supplied
- Payment terms and due date in bold
- Multiple payment methods (bank transfer, check, card processing via Square or PayPal)
- Your contact person's phone and email for questions
A vague invoice saying "Cabinet work - $5,000" invites delays because the client can't match it to their purchase order. Specific line items like "Custom white oak door frames (qty 6), machine time, assembly, finish prep" help accounting departments process payment faster.
Consider Staged Payments for Larger Projects
Jobs exceeding $10,000 should split into milestones:
- 33% upon order confirmation (secures materials)
- 33% upon rough completion or frame assembly
- 33% upon final delivery and installation
This structure is especially valuable if the job has a long lead time or requires client sign-offs mid-process. It also protects you if a client halts the project mid-build. Clearly define what "completion" means for each stage (e.g., "all components manufactured and sanded, ready for finish application").
Track Everything and Follow Up Fast
Use invoicing software like FreshBooks, Wave, or QuickBooks that automatically sends payment reminders. When a payment passes due:
- Day 5 overdue: Send a friendly email reminder (most are genuine oversights)
- Day 15 overdue: Call the client's accounting contact directly
- Day 30 overdue: Escalate and consider halting future work
Millwork shops with strong reputations rarely deal with truly bad debt—but slow payers are common. A phone call often resolves it in 48 hours.
Leverage Digital Listing to Attract Better-Paying Clients
Listing your CNC millwork services on platforms like Mercoly helps you reach clients actively seeking custom fabricators, qualify leads before quoting, and build credibility that supports faster payment from established design firms and contractors.
Frequently Asked Questions
Q: Should I charge sales tax on millwork delivered out of state? Tax laws vary by destination state and whether the items are considered finished goods or taxable labor. Consult your CPA or state tax authority; some states exempt manufacturing labor while taxing materials. Always verify before quoting.
Q: What's a reasonable deposit amount if a client wants custom species we don't stock? Require 75–100% prepayment for exotic hardwoods or veneers you must special-order. The material cost is non-refundable once purchased, so protect yourself upfront.
Q: How do I handle payment disputes over quality issues? Withhold the disputed amount (don't release final payment), document the issue with photos, and work toward a resolution or agreed-upon credit within 30 days. Clear specifications in your quote prevent most disputes.
Start enforcing consistent payment terms this week—your cash flow depends on it.