AIA Billing and the 25-Day Hole That Maxes Your Credit Cards

A subcontractor on r/Construction laid out the math better than any textbook:

"From a sub standpoint, I've been finding it difficult to stay ahead of cash flow and we end up getting uncomfortably close to breaking the bank. First payment in roughly 55 days. 25 day gap when ordering materials on net 30."

That 25-day gap is the entire reason small subcontractors max out their credit cards, miss payroll once a year, and turn down growth they should be taking. This post is about the math, the tactics, and the structural fixes.

How AIA billing actually works

If you're new to commercial construction or just signed your first GC contract, here's the timeline:

1. Day 1: You start work on a project
2. Day 25: Cutoff for the month's work — you finish documenting completed percentage
3. Day 25-30: You prepare AIA G702 (Application for Payment) + G703 (Continuation Sheet) showing percent complete by line item
4. Day 30: Pay app submitted to GC
5. Day 31-45: GC reviews, requests revisions, processes through their accounting
6. Day 45-55: GC pays you (usually net-30 from approval, not from submission)
7. Day 55: You receive payment for work done in the first ~25 days

That's 30 days of work, then 30 days of waiting, before any cash.

But it's worse on the next pay app. Once you're in the rhythm:

• Day 25-50: You do month 2's work (paid on day 80)
• Day 50-75: You do month 3's work (paid on day 105)

You're constantly 2 months of work in front of cash.

And: 5-10% of every payment is held back as retainage until the project is substantially complete (typically 6-18 months later, sometimes longer).

The supplier mismatch

Now layer on supplier terms. Most material suppliers offer:

• COD for new accounts
• Net 15-30 once established
• Lien rights if you don't pay (suppliers can lien the project against the GC's bond)

So your supplier wants payment 30 days after delivery. But the work that consumed those materials won't be paid by the GC for 55-105 days.

The cash hole math for a $50,000-per-month subcontractor:

This is the BEST case scenario where the GC pays exactly on day 55. In practice, GCs pay anywhere from day 50-90 depending on their treasury practices, and often hold back 5-10% in retainage.

For three concurrent projects, the cash gap can easily be $80-200K. That's why subcontractors at $1-3M are constantly on the edge of insolvency despite being profitable.

Why credit cards are the silent killer

The most common bridge for this gap is the owner's personal credit card or business credit cards. The math:

"Personal credit cards max out to keep the ball rolling and banks don't want to lend me because I am maxed out." — contractor, r/Construction

This is the trap: credit card debt limits your ability to get cheaper bank credit. The cycle compounds.

Tactical fixes (in order of impact)

1. Submit pay apps early in the GC's cycle (free, immediate)

Most GCs have an internal pay-app cycle: applications received by the 5th of the month process that cycle. Applications received the 6th wait until next month — which adds 30 days.

Knowing the GC's actual cycle and submitting on day 25-28 instead of day 30-31 can shorten payment by a full month.

2. Negotiate net-45 or net-60 supplier terms (free, requires relationship)

Established subcontractors with clean payment history can usually negotiate net-45 or net-60 with key suppliers. This single change can move your cash hole from -$47K to -$15K in the example above.

The leverage you have: volume, payment history, willingness to send a guaranteed payment from each GC payment. Suppliers want predictable cash from you more than they want fast cash.

3. Build a real revolving line of credit (modest cost, structural)

A bank line of credit at prime + 2-3% costs roughly 1/3 of credit card debt. Use the line to bridge the AIA gap, repay each line of credit draw as the corresponding GC payment arrives.

For a $50K/mo subcontractor, a $200K line of credit is realistic. Costs roughly $1,500-3,000/year in interest if managed actively.

4. Joint check agreements with key suppliers (free, GC-specific)

A joint check agreement is a commitment that the GC will issue a check made payable to both you and your supplier for materials. This:

• Gives the supplier security (they get paid when you do)
• Allows the supplier to extend terms (because they're not relying on your credit)
• Lets you carry less working capital

Not all GCs allow this, but the larger ones often do for material-heavy trades.

5. Aggressive retainage management (medium effort, big cash impact)

Retainage often sits for 12-18 months waiting for substantial completion certificates. By then, owners forget about it. Run a quarterly retainage report. Chase aged retainage actively. For projects approaching completion, request retainage release as a milestone.

For a busy subcontractor, $50-150K of retainage is normally outstanding at any time. Recovering even half of stale retainage materially changes cash position.

6. Construction factoring (high cost, last resort)

Factoring (selling your receivables to a factor at a discount) costs 1.5-3% per 30 days. It's expensive but liquid and fast. Use it only when:

• Bank credit is unavailable
• The discount is less than the cost of declining work
• You can't extend supplier terms

For most subcontractors, factoring should be a stop-gap, not a permanent solution.

The structural fix: pricing in working capital cost

Most small contractors don't include the cost of carrying receivables in their pricing. They should.

For a 60-day collection cycle, the cost of capital on AR is roughly:

• 60 days / 365 = 16.4% of the year
• At 12% cost of capital = 16.4% × 12% = 1.97% of revenue

So a $500,000 project really costs you ~$10,000 in financing cost that you may not be charging for. Across $2M of annual revenue, that's $40,000 in margin you're absorbing.

Adding 1.5-2% to your bid prices to cover working capital cost is defensible and standard for sophisticated contractors. Most small subs leave it on the table.

When the gap means something is broken

Some warning signs that the AIA cash gap is no longer just a cash issue but a structural problem:

• Material suppliers asking for COD — your credit reputation is damaged
• Payroll funded by personal money more than 1-2 times per year
• Tax payments getting delayed — payroll tax especially
• Refusing profitable work because you can't fund the materials
• Considering owner draws to pay vendors, then re-borrowing

Each of these is a flag that the business needs financial restructuring beyond just better cash management.

When to call Level

Cash flow forecasting and working capital management are core fractional CFO functions. For small contractors at the AIA-billing transition (typically $500K-$5M revenue), Level can:

• Build a 13-week rolling cash forecast
• Negotiate supplier terms restructuring
• Source and structure bank lines of credit
• Implement retainage tracking and aging
• Re-price upcoming bids to recover working capital cost

This is usually 8-15 hours of CFO time per month plus a competent construction-experienced bookkeeper.

FAQ

What's the typical retainage percentage on commercial projects? 5-10% on most commercial work, 10% on residential. Some states cap retainage by law (Texas at 5% on public projects, for example). Read your contracts carefully — retainage above 10% is unusual and worth pushing back on.

Can I charge interest on late GC payments? Some states allow prompt-pay interest by statute (1-2% per month over a base rate). Most contracts also have specific terms. In practice, charging interest is rare because it damages the GC relationship — but knowing your right to it is leverage.

Should I diversify across more GCs? Yes. Concentration risk above 30-40% of revenue from a single GC is dangerous. If they slow-pay or go bad, you're exposed. Most stable subs target 4-8 active GC relationships.

Is there sub-specific working capital financing? Yes. Construction-focused lenders (BlueVine, BillD, Levelset for receivables specifically) understand the AIA cycle better than general banks. Rates are higher than bank lines but lower than factoring. Worth exploring once revenue exceeds $1M.

Related reading:

• Why Contractors Bill Millions and Collect Thousands Less
• How Retainage Kills Contractor Cash Flow
• The Construction Cash Flow Crisis: $280B Problem in Data