How do I set up invoicing platform workflows for progress billing on custom home projects?

To set up invoicing platform workflows for progress billing on custom home projects, you want a system that ties together your contract milestones, change orders, payment schedule, invoicing, retainage, and approvals.

Here’s a practical setup you can use.

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1) Define the billing structure up front

For each custom home project, create a billing schedule in the contract before work starts.

Common progress billing models:

• Milestone-based: e.g. deposit, foundation, framing, rough-in, drywall, finish, final
• Percentage complete: invoice a set % of the contract as work progresses
• Cost-plus with markup: invoice actual costs plus fee/markup, usually with regular billing cycles
• Hybrid: milestone payments plus monthly invoicing for time/materials or approved extras

Best practice:

• Tie every invoice trigger to a specific deliverable
• Include a retention percentage if your contracts use retainage
• Define how change orders are billed

Example:

• 10% deposit at contract signing
• 15% at permit approval
• 20% at foundation complete
• 20% at framing complete
• 15% at rough-ins complete
• 15% at drywall/trim complete
• 5% at substantial completion

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2) Set up project stages in the invoicing platform

Your invoicing platform should support custom statuses or workflows. Create stages such as:

1. Project created
2. Contract signed
3. Deposit invoiced
4. Deposit paid
5. Milestone reached
6. Invoice drafted
7. Internal approval
8. Sent to client
9. Paid
10. Closed out

If the platform allows automation, use status changes to trigger invoice creation.

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3) Build invoice templates for each billing event

Create templates for:

• Deposit invoice
• Progress invoice
• Change order invoice
• Final invoice
• Retainage release invoice if applicable

Include:

• Project name and address
• Contract number
• Billing period or milestone
• Line items tied to scope
• Amount completed this period
• Previous billed amount
• Current amount due
• Retainage withheld
• Total due now
• Due date and payment instructions

A good progress invoice layout often includes:

• Original contract amount
• Approved change orders
• Total revised contract amount
• Percentage complete
• Work completed to date
• Less previously billed
• Current billing
• Retainage
• Amount due

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4) Track completion with a job-cost or milestone approval process

Do not let invoicing rely only on memory. Set up a workflow where billing requires confirmation from:

• Project manager
• Superintendent
• Estimator
• Accounting

A simple approval sequence:

1. PM marks milestone complete
2. Accounting verifies contract and prior billings
3. Invoice is generated
4. Final approval
5. Invoice sent

If your platform supports it, use:

• Photo uploads
• Field checklists
• Signed milestone completion forms
• Vendor cost backups

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5) Link change orders directly to billing

Custom home projects change often, so make change orders a separate workflow.

Change order process:

1. Change request submitted
2. Scope and price approved
3. Change order signed by client
4. Change order added to project total
5. Billed immediately or on next progress invoice

Important:

• Never bill unapproved change orders unless your contract allows it
• Keep change orders visible in the invoice summary so the client sees the revised total

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6) Configure retainage if needed

Many custom home contracts hold back a portion of each invoice until completion.

Typical retainage:

• 5% to 10% of each progress payment

Workflow:

• Invoice shows gross amount
• Retainage withheld
• Net amount due
• Separate retainage ledger tracked by project
• Final retainage invoice issued after completion and punch list signoff

Make sure your platform can:

• Track retainage by project
• Show retainage outstanding
• Release retainage at the right time

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7) Automate reminders and payment collection

Set reminders for:

• Invoice due date
• Overdue notices
• Milestone approval requests
• Unpaid retainage follow-up

Useful automations:

• Invoice email sent automatically when approved
• Reminder email 3 days before due date
• Past-due notice at 7/14/30 days
• Payment receipt triggers project status update

If possible, enable online payments:

• ACH
• Credit card
• Bank transfer

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8) Integrate with accounting and job costing

For custom home builders, invoicing should not live in isolation. Connect it to:

• Accounting software
• Job costing
• Purchase orders
• Payroll/time tracking
• Document storage

This helps you:

• Compare budget vs actual cost
• See gross margin by project
• Match invoices to expenses
• Avoid overbilling or underbilling

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9) Create a standardized billing calendar

If your projects are long and complex, use a recurring billing cycle:

• Weekly
• Biweekly
• Monthly

Then bill only the approved work completed during that cycle.

This is especially useful for:

• Cost-plus projects
• Projects with many small scope changes
• Jobs where milestone timing is unpredictable

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10) Put controls in place to prevent billing errors

Progress billing gets messy without controls. Add safeguards:

• Invoice cannot exceed contract total plus approved change orders
• Invoice cannot be sent without milestone approval
• Retainage calculations are automatic
• Prior billings are pulled into each new invoice
• Unapproved extras are flagged separately

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Suggested workflow for a custom home project

Here’s a simple end-to-end workflow:

1. Create project
2. Enter contract value and billing schedule
3. Set retainage terms
4. Add approved change orders as they occur
5. PM marks a milestone complete
6. System drafts progress invoice
7. Accounting reviews contract, costs, prior billings
8. Invoice approved and sent
9. Payment recorded
10. Project status updated
11. At completion, issue final invoice and release retainage

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Example invoice workflow by stage

Deposit

• Trigger: contract signed
• Invoice: deposit due immediately
• Status: pending payment

Foundation complete

• Trigger: milestone approval
• Invoice: foundation billing less prior deposit and retainage
• Status: sent

Change order approved

• Trigger: signed CO
• Invoice: add to next bill or invoice immediately
• Status: CO billed

Final completion

• Trigger: punch list complete and owner signoff
• Invoice: final balance plus retainage release
• Status: closed

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What to look for in the invoicing platform

Choose a platform that supports:

• Custom invoice templates
• Milestone-based billing
• Progress billing calculations
• Retainage
• Change orders
• Approval workflows
• Recurring invoices
• Accounting integration
• Client portal and online payment
• Project-level reporting

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If you want a simple starting setup

If you’re using a basic invoicing tool, start with this minimum workflow:

• One project record per home
• One contract total
• One billing schedule sheet
• Separate invoice template for progress billing
• Manual approval before sending
• Change order log
• Retainage tracking spreadsheet if the software lacks it

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If you want, I can also help you build:

1. a sample progress billing workflow,
2. a custom home invoice template, or
3. a step-by-step setup for a specific platform like QuickBooks, Buildertrend, or Sage.