Commercial Construction: Funding Mobilization, Draws, and Retainage

Need working capital? See your options — free, no obligation.
Apply now → Secure your capital
Compare all revenue-based financing options →
By Jon Lynch — Commercial Finance Broker, Jon Lynch Financial Group · Veteran-owned · Updated July 20, 2026

Commercial GCs and subs typically run $100,000 to over $1 million a month through their accounts, and the cash problem is rarely profitability — it's timing. Mobilization costs — crew, equipment, initial materials — land before the first draw is ever submitted, let alone paid. Draws are billed against completed work, reviewed, and paid on the owner's or GC's schedule, commonly 30 to 45 days after submission. Retainage — 5% to 10% of every draw — is withheld until the project is substantially complete, and often isn't released until months after the crew has moved to the next job.

Add a change order and the timing gets worse before it gets better: the added work is frequently performed before it's fully priced and approved, which means it's funded out of the same stretched cash as everything else.

The result is a contractor that's profitable on the job-cost report and still short for Friday payroll. That's a cash-flow problem, not a business problem, and it's usually better solved with a bridge against a specific draw or receivable-backed financing against billed work — not a general advance, which prices and remits against total deposits rather than the one draw that's actually late.

22%

of small business financing applicants received none of the financing they sought
Federal Reserve, 2026 Small Business Credit Survey

The other 78% were priced, sized, or partially funded — GCs among them, since a job's profitability on paper rarely matches its cash position mid-project.

How much working capital does a commercial contractor need?

Enough to cover mobilization plus one full draw cycle — commonly 30 to 45 days — without relying on the next draw to fund the current one. Contractors in this range typically run $100,000 to over $1 million a month in deposits, and the right reserve or facility size scales with the largest job currently mobilizing, not the average job.

Core placements run $50,000 or more a month in deposits — squarely where commercial construction sits. Most deals land between $20,000 and $200,000 a month, with a dedicated program for contractors still building toward that.

What does the draw schedule actually do to cash flow?

It delays payment for work already performed by roughly 30 to 45 days after the draw is submitted, reviewed, and approved. Mobilization happens first and is billed last. The table below shows one project's shape.

Illustrative cash timeline for one $400,000 project phase — not a quote.
MilestoneCash outCash inRetainage held
Mobilization (Week 0)Crew, equipment, initial materials$0
Draw 1 submitted (Week 4)Ongoing labor & materials$010% withheld on approval
Draw 1 paid (Week 6-8)~90% of draw 1Balance carried
Draws 2-4 (Weeks 8-20)Continued labor & materialsPaid on same 30-45 day lag10% withheld each draw
Substantial completionFinal draw, less retainageRetainage becomes due
Retainage release (months later)5-10% of total contract valueReleased

Every row before "retainage release" is cash the contractor has already spent. The row that actually closes the gap can land months after the crew has moved on.

What is retainage, and when do you actually see it?

Retainage is 5% to 10% of every draw, withheld by the owner or GC until the project reaches substantial completion — and it commonly isn't paid out until months after that. On a $2 million contract at 10%, that's $200,000 sitting with the owner while the contractor has already paid its crews and suppliers for the full value of the work.

Retainage exists to protect the owner against unfinished punch-list items. It doesn't protect the contractor's payroll, and it's the single largest reason a fully performing job still shows up as a cash drain for months after the work is done.

Why do change orders create a funding gap of their own?

Because the added work is routinely performed before it's priced, approved, and added to the draw schedule. A supplemental scope discovered mid-project — hitting rock the geotechnical report missed, an owner-requested finish upgrade — gets built first and negotiated second. Materials and labor for that scope come out of the same stretched cash as the base contract, often for weeks before it's formally billable.

Why can a contractor be profitable and still miss payroll?

Because job-cost profitability is measured against total contract value, while cash is measured against what's actually been collected — and retainage plus the draw lag mean those two numbers rarely match mid-project. A GC can show a healthy margin on the job-cost report and still be short on a specific Friday, because 10% of every draw paid so far is sitting as retainage and the next draw hasn't cleared yet.

Is a bridge, receivable-backed financing, or an advance the right fit?

Usually a bridge against a specific approved draw, or receivable-backed financing against billed work — not a general revenue-based advance. An advance prices and remits against total deposits, which punishes the contractor's entire cash flow for a gap that's really about one late draw or one retainage release. A bridge or receivable-backed structure ties funding to the actual document — the draw, the pay application, the retainage schedule — and is sized and repaid against that specific inflow.

Which structure fits which construction cash gap.
StructureFinanced againstFits best when
Bridge financingOne specific, dated, documented inflow — an approved draw or retainage releaseYou're waiting on one identifiable payment and know roughly when it lands
Receivable-backed financingBilled, approved draws or pay applications generallyYou have an ongoing pattern of approved draws moving through a predictable review cycle
Revenue-based advanceOverall business deposits, not tied to one drawYou need general operating capital not tied to a specific job's draw schedule
Equipment financingThe equipment itself, as collateralYou're buying or replacing equipment rather than covering a draw-timing gap

For most contractors carrying a mobilization or retainage gap on an identifiable job, the bridge or receivable-backed route is both cheaper and more targeted than a general advance. Say so plainly: paying to fix one job's timing with financing sized to the whole business is usually the wrong tool.

What does a funder look at on a construction file?

The contract, the draw schedule, the retainage terms, and the creditworthiness of the paying owner or GC — not just the contractor's own financials.

When should a contractor hold off on financing?

Financing a timing gap is different from financing a bad job.

A few honest lines before financing the gap instead of the problem:

Mobilized. Waiting on the draw. Tell us the contract, the draw schedule, and what's held in retainage, and we'll size the structure that actually fits — bridge, receivable-backed, or general capital.

See your options →

No credit pull to talk. Business-purpose financing only.

Under $20K a month in deposits? Most of what's above is priced for businesses doing $50K or more a month in deposits — that's the core of what we place. Funding doesn't stop below that line, though; the structure just changes. There's a program built for exactly your revenue level, and the same rule applies either way.

See what you qualify for →

Handled through a funding partner. No upfront cost, and we're paid only if it funds.

Frequently asked questions

How much working capital does a commercial contractor need?
Enough to cover mobilization and one full draw cycle — commonly 30 to 45 days — without depending on the next draw to fund the current one. Contractors in this range typically run $100,000 to over $1 million a month in deposits.
What is retainage, and when is it actually paid?
Retainage is 5% to 10% of every draw, withheld until substantial completion and often released months after the work is finished. On a $2 million contract at 10%, that's $200,000 held after the crew has moved on.
Why can a contractor be profitable and still miss payroll?
Because job-cost profitability is measured against total contract value, while cash is measured against what's actually been collected. Retainage and the draw-approval lag mean those two numbers rarely match mid-project.
Is a bridge or an advance the better fit for a late draw?
Usually a bridge, or receivable-backed financing against the draw itself. A general advance prices against total deposits and punishes the whole business for a gap that's really about one late payment.
Are change orders funded before they're approved?
Often, yes. The added scope is frequently built before it's priced and added to the draw schedule, which means labor and materials for it come out of the same stretched cash as the base contract.
Is there a program for contractors under $20,000 a month in deposits?
Yes. Core placements run $50,000 or more a month, but there's a dedicated program below $20,000 — the structure changes, funding doesn't stop.

Related reading