What it means
For non-finance managers, understanding progress billing is essential when dealing with long-term projects, large contracts, or custom manufacturing. When a project takes months to complete, waiting until the very end to get paid can create massive cash flow problems.
You would still need to pay your staff, buy materials, and cover overhead costs during that time. Progress billing solves this by breaking the total contract price into smaller, manageable chunks.
In practice, you agree with your client beforehand on a schedule of payments. This might be tied to calendar dates, physical milestones like finishing the foundation of a building, or the percentage of completion.
As each milestone is met, you issue an invoice for that specific portion of the work. This keeps money flowing into your business regularly, reducing the financial strain of funding a large project out of your own pocket.
From an accounting perspective, progress billing requires careful tracking. You must match the revenue you invoice with the actual costs incurred to ensure your profit margins remain accurate.
If you bill too much too quickly, you risk annoying your client. If you bill too slowly, you risk running out of cash.
Finding the right balance helps maintain a healthy relationship with your client while keeping your business financially secure. Imagine paying for a custom three-course meal at a high-end restaurant.
Instead of paying only when the entire meal is eaten, you pay for the starter, then the main course, and finally the dessert as each plate arrives at your table.
In practice
Real-world examples
Example 1
A custom software agency building a digital platform for a client splits a $10,000 project into four progress payments of $2,500 tied to key design and coding milestones. Each payment arrives when the client approves a stage, so the agency never funds more than one stage at a time.
Example 2
An interior design firm renovating a local office charges a medium-sized enterprise in three stages: a deposit upfront, a second payment halfway through, and the final balance upon completion. On a $30,000 contract, this might be $9,000, $12,000, and $9,000, giving the firm cash to buy materials as it goes.
Example 3
A manufacturing business creating custom machinery for a large factory uses progress billing to request 20% upfront, 50% upon delivery of parts, and 30% after installation. On a $200,000 order, that is $40,000, $100,000, and $60,000. The early payments reduce the amount of working capital the manufacturer must borrow.
Think of it
Imagine paying for a custom three-course meal at a high-end restaurant. Instead of paying only when the entire meal is eaten, you pay for the starter, then the main course, and finally the dessert as each plate arrives at your table.
Formula
Calculation
Amount Billed to Date = Total Contract Price x Percentage of Work Completed
Current Invoice = Amount Billed to Date - Previously Invoiced Amounts
Example: A $50,000 project is 40% complete. The amount billed to date is $50,000 x 0.40 = $20,000. If previous invoices total $15,000, the current invoice is $20,000 - $15,000 = $5,000.
A cost-based check helps. If the contractor expects total costs of $40,000 and has spent $16,000 so far, the percentage complete is $16,000 / $40,000 = 40%, which agrees with the 40% above. Billing $20,000 against $16,000 of costs also shows the project is on track to earn the planned profit of $10,000 ($50,000 - $40,000).Case study
Seen in the real world
This is a fictional, illustrative scenario. Apex Fitout, a commercial interior design company, secured a $60,000 contract to refurbish a local community centre. The project was scheduled to last three months, involving heavy upfront costs for materials and labour. Without progress billing, Apex would have faced severe cash flow pressure, struggling to pay wages and suppliers before receiving a single lump sum at the end.
Instead, Apex agreed to a progress billing schedule with the client. They divided the project into three milestones: a 20% deposit upon signing, 40% after completing the structural demolition and wiring, and the remaining 40% upon final handover. The deposit was $12,000, and when the demolition phase finished, Apex issued an invoice for $24,000. This steady stream of income allowed Apex to pay their subcontractors on time without drawing on emergency credit.
The project finished on schedule, and the final invoice of $24,000 was settled smoothly. By using progress billing, Apex maintained a healthy cash buffer and delivered the project without financial stress. The three invoices totalled $12,000 + $24,000 + $24,000 = $60,000, exactly the contract price.
Watch out
Common mistakes
- Failing to clearly define the billing milestones in the initial contract, leading to disputes over when payments are actually due.
- Forgetting to subtract previously billed amounts, which results in accidentally double-billing your client.
- Falling behind on issuing invoices as work progresses, which defeats the cash flow benefits of the method.
Questions
People also ask
How do I calculate the percentage of completion?
You can calculate it by comparing the costs incurred so far against the total estimated costs for the entire project, or by evaluating physical progress against the project scope.
Is progress billing only for construction companies?
No. While common in construction, it is widely used in software development, manufacturing, consulting, and any industry involving long-term projects and high costs.
What happens if a client refuses to pay a progress invoice?
Clear contracts should outline your right to pause work until overdue payments are settled, protecting your business from taking on further unpaid risk.