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What's the Impact of AIA vs. Progress Billing on Cash Flow?
Both methods bill as work gets done. The format you pick changes how fast and how smoothly cash arrives.
AIA billing and progress billing both let you get paid during a job, not just at the end. The difference is the format and the paperwork. That difference shapes how quickly cash flows into your business.
What is the difference between AIA and progress billing?
| 1 | Original contract sum | $266,350.00 |
| 2 | Net change by change orders | $4,046.00 |
| 3 | Contract sum to date | $270,396.00 |
| 4 | Total completed & stored to date | $62,789.85 |
| 5 | Retainage (10%) | $6,278.99 |
| 6 | Total earned less retainage | $56,510.86 |
| 7 | Less previous certificates for payment | $31,240.50 |
They sound alike, but they work differently. AIA billing uses set forms. Progress billing is more flexible.
- AIA billing: standard pay apps (G702 and G703) common on commercial work
- Progress billing: flexible, tied to milestones or percent complete
For the full breakdown, see progress billing vs. AIA billing.
How do billing methods affect cash flow?
Billing structure sets when money lands. Knowing the trade-offs helps you plan payroll and materials.
- AIA forms give clear, lender-friendly backup but can slow approvals
- Progress billing is faster to issue but may show less detail
- Retainage is easier to track on AIA forms than on informal billing
Either way, retainage holds back 5% to 10%, so plan for that gap.
What are the pros and cons of each method?
No method wins every time. Weigh them against your project type and client.
- AIA billing pros: standard, transparent, lender-approved
- AIA billing cons: slower, more paperwork, more room for errors
- Progress billing pros: flexible, faster invoicing
- Progress billing cons: less detail, higher dispute risk
When should you use each method?
Let the project and the client decide. Match the method to who is paying.
Use AIA billing on commercial, public, or bonded jobs that demand G702 and G703. Use progress billing on smaller private jobs that want a simpler invoice. When a lender or audit is involved, the AIA format usually wins.
- Commercial, public, or bonded: AIA billing
- Smaller private jobs: progress billing
- Lender or audit on the job: AIA billing
How does contractor software support both billing methods?
Contractor software like Werx runs both methods and keeps cash flow steady. It syncs with QuickBooks for accurate books.
- Generate AIA-style pay apps (G702/G703) in minutes
- Create flexible progress invoices by percent or milestone
- Track retainage and payment schedules automatically
- See cash flow across all your projects
Key takeaways
- AIA and progress billing both pay you during the job
- AIA gives lender-friendly detail; progress billing is faster and simpler
- Pick AIA for commercial, public, or lender-backed work
- Werx runs both methods and syncs with QuickBooks
Frequently Asked Questions
Which is better for cash flow: AIA or progress billing?
Progress billing is usually faster. AIA billing adds transparency that helps avoid disputes on large commercial jobs.
Do small contractors need AIA billing?
Not always. Many use progress billing. But banks, government agencies, or strict audits may require AIA pay apps.
Can software handle both billing methods?
Yes. Werx supports AIA and progress billing, so you switch by project while keeping cash flow steady.
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