Private Money LendersRead time: 30 seconds
- A cost overrun is spend above the budget line it belongs to, measured line by line — you can be under budget overall and still trigger a review.
- A rerun is triggered by bigger signals: exhausted contingency, one line over by a wide margin, a scope change, a draw exceeding the line balance, or cost outrunning the ARV.
- Lenders rarely just increase the loan, because that raises loan-to-cost and can break the after-repair-value ceiling.
- Four ways to fund the gap: reallocate within the budget, document a change order, inject cash, or — only if value allows — request a loan increase.
- Contingency is your real budget. Guard it for the unexpected, not for elective upgrades, and the rerun conversation rarely happens.
What a cost overrun is — and isn’t
A cost overrun is any spend above the approved budget line it belongs to. On a construction loan it matters because the lender funds against that budget — so an overrun is not just your problem, it is a question about whether the loan is still correctly sized for the project it is financing.
The distinction that trips up borrowers: an overrun is measured line by line, not against the bottom-line total. You can be under budget overall and still trigger a review because the framing line blew through by 40%. The lender cares about the line because draws are released against line items on the schedule of values, and an exhausted line means future work in that trade has no funding source.
There is also a difference between an overrun and a change order. A change order is a deliberate scope change — you decided to add a bathroom. An overrun is the same scope costing more than budgeted. Both can force a budget rerun, but lenders treat a documented change order very differently from an unexplained cost creep.
What actually triggers a rerun
Not every overage forces the lender to re-underwrite. A small overage absorbed by contingency is routine. A rerun — the lender formally re-sizing the budget and sometimes the loan — is triggered by bigger signals:
| Trigger | Why it forces a rerun |
|---|---|
| Contingency exhausted | The buffer that absorbs small overages is gone; further overruns have no funding source |
| A single line over by a large margin | Suggests the original bid was wrong, so other lines may be too |
| Scope change / change order | New work needs new budget lines and possibly more loan proceeds |
| Draw request exceeds remaining line balance | The GC is asking for more than the line holds — the math no longer closes |
| Appraisal / ARV at risk | If overruns push total cost above what the finished value supports, the LTV breaks |
The last row is the one that turns a budget conversation into a loan conversation. A construction loan is sized to a loan-to-cost and a loan-to-(after-repair)-value ceiling at the same time. Overruns push total cost up; if cost climbs faster than value, the lender’s LTV protection erodes and it cannot simply lend the gap.
How the lender re-sizes
Here is the arithmetic on a typical rerun. Take a $300,000 rehab budget with a 10% contingency:
The lender now asks one question: where does the $12,000 come from? It will not usually just increase the loan, because doing so changes the LTC and may break the ARV ceiling. Instead it looks for the gap to be filled before more draws release — from reallocated budget, a borrower cash injection, or, only if the value supports it, a loan increase.
A lender does not fear an overrun. It fears an overrun with no funded path to completion — a half-finished house it cannot sell and cannot draw against.
Your options when you blow the line
Four realistic moves, roughly in order of how much the lender likes them:
1. Reallocate within the budget. If the roofing line came in $8,000 under and framing went $8,000 over, the lender can shift the surplus. This is the cleanest fix because the total does not move — it is a paperwork change to the schedule of values, not new money.
2. Document a change order. If the overrun is a real scope change, a signed change order with updated subcontractor bids lets the lender re-underwrite the specific line rather than question the whole budget.
3. Inject cash. The borrower funds the gap out of pocket. Lenders accept this readily because it restores the funded path to completion without increasing their exposure. Expect to show the deposit before the next draw releases.
4. Request a loan increase. Only available if the after-repair value has room — i.e., the finished project is worth enough that the bigger loan still sits under the LTV ceiling. This requires a re-appraisal or a desk review and is the slowest path.
Why the contingency line is your real budget
Experienced borrowers treat the contingency as the project’s shock absorber and guard it. A 10–15% contingency is standard; on older properties or heavy structural work, 15–20% is prudent because the surprises are bigger. The mistake is treating contingency as a slush fund for upgrades — spending it on nicer finishes early, then having nothing left when the foundation surprise arrives in month four.
The discipline is simple: contingency funds the unexpected, not the elective. An upgrade is a change order with its own funding decision; a rotted joist you could not see at bid is what contingency exists for. Keep them separate and the rerun conversation rarely happens.
Keeping a rerun from killing your timeline
A rerun is not fatal, but it is slow — days to weeks while the lender reviews, and your draws pause in the meantime. To keep it from stalling the job: flag overruns early rather than at the draw that exhausts the line, bring documentation (bids, change orders, inspection notes) before you are asked, and propose the fix yourself. A borrower who walks in with “framing is $8k over, here is the roofing surplus to cover it” gets a same-day reallocation. A borrower who submits a draw that silently exceeds the line gets a full rerun. The difference is preparation, not luck.
Glossary
- Cost overrun
Spend above the approved budget for the line item it belongs to; measured line by line, not against the total.
- Budget rerun
The lender formally re-sizing the project budget — and sometimes the loan — after overruns or scope changes.
- Contingency
A budgeted buffer (typically 10–15%) that absorbs unexpected costs without forcing a rerun.
- Change order
A documented, deliberate change to project scope, with its own funding decision — distinct from a cost overrun.
- Loan-to-cost (LTC)
The loan as a percentage of total project cost; rises when overruns push cost up.
- After-repair value (ARV)
The finished value the loan’s LTV ceiling is measured against; if cost outruns ARV, the lender cannot fund the gap.
Frequently asked questions
What triggers a construction loan budget rerun?
A rerun is usually triggered by the contingency being exhausted, a single line running over by a large margin, a scope change or change order, a draw request that exceeds the remaining line balance, or overruns that push total cost above what the after-repair value supports. Small overages absorbed by contingency do not trigger one.
Is a cost overrun measured against the total budget or each line?
Each line. Draws release against individual line items on the schedule of values, so a line can be exhausted — leaving future work in that trade unfunded — even if the project is under budget overall.
Will my lender just increase the loan to cover an overrun?
Not usually. Increasing the loan raises the loan-to-cost and may break the after-repair-value ceiling. Lenders prefer the gap be filled by reallocating budget or a borrower cash injection, and will only increase the loan if the finished value leaves room under the LTV cap.
What is the difference between a cost overrun and a change order?
A change order is a deliberate scope change — you added work. An overrun is the same scope costing more than budgeted. Lenders re-underwrite a documented change order against its specific line, but treat an unexplained overrun as a reason to question the whole budget.
How much contingency should a rehab budget have?
Ten to fifteen percent is standard. On older properties or heavy structural work, fifteen to twenty percent is prudent because the surprises are larger. Treat contingency as the buffer for the unexpected, not a slush fund for elective upgrades.
Can a cost overrun stop my draws?
Yes. A draw request that exceeds the remaining line balance, or overruns that exhaust contingency, can pause draws while the lender reviews and re-sizes. Flagging overruns early with documentation and a proposed fix is the fastest way to keep draws moving.
What happens if overruns push my total cost above the ARV?
That is the most serious case, because the loan is sized to a percentage of the after-repair value. If cost climbs above what the finished project is worth, the lender’s LTV protection erodes and it cannot lend the gap — the borrower typically has to inject cash or rescope to bring the project back under the ceiling.
Worried your rehab budget is tight?
Send us the scope and the numbers. We will pressure-test the budget and contingency before you close — so an overrun mid-project is a reallocation, not a rerun that stalls your draws.