Completion Guaranty
A guaranty in which the borrower (or a principal) personally promises the lender that a construction project will be finished — lien-free and on time — even if costs exceed the loan, regardless of the property's value.
A completion guaranty is a promise — usually from the investor or a principal of the borrowing entity — that a construction or major rehab project will be completed: built per plans, free of mechanic's liens, and finished on schedule. Critically, it obligates the guarantor to cover cost overruns and finish the job out of their own pocket if the loan proceeds fall short. It's a staple of new construction loans and heavy-rehab fix-and-flip financing.
Completion guaranty vs. payment guaranty
These are different promises an investor should not confuse:
- Completion guaranty — guarantees the project gets finished (and stays lien-free). The lender can compel the guarantor to fund completion even beyond the loan amount.
- Payment guaranty (a personal guarantee) — guarantees repayment of the debt.
- Carve-out guaranty — guarantees against specific bad acts on an otherwise non-recourse loan.
A single deal may require more than one.
Why lenders require it
A half-finished building is poor collateral — it can't be rented, sold, or appraised at full value, and it may have liens attached. The lender's downside on an incomplete project is severe. The completion guaranty shifts the completion risk to the guarantor: finish it, lien-free, no matter what it costs.
A worked example
Ground-up build, $500,000 loan, $500,000 budget.
Midway, lumber and labor overruns push total cost to $560,000.
The loan won't stretch to cover the extra $60,000.
Under the completion guaranty, the guarantor must fund the
$60,000 gap from personal funds to finish the project lien-free.
Without the guaranty, the lender would be stuck with an unfinished, unsellable asset.
How it's used in investor lending
For construction and major-rehab loans, expect to sign a completion guaranty as a principal — it's standard, even on entity (SPE LLC) borrowers and even when the loan is otherwise non-recourse. The practical takeaway: budget a real contingency reserve (often 10%+) so you're not personally funding overruns, and vet your general contractor and fixed-price contract carefully, because the completion guaranty makes you the backstop if the project runs over.
This is general information, not legal advice.
Frequently asked questions
What's the difference between a completion guaranty and a payment guaranty?
A completion guaranty promises the project will be finished, lien-free and on time, and obligates the guarantor to fund cost overruns to complete it — even beyond the loan amount. A payment guaranty (a personal guarantee) promises repayment of the debt itself. Construction loans often require both, plus carve-out protections.
Do I have to sign a completion guaranty on a non-recourse construction loan?
Often yes. Even when a construction loan is non-recourse for repayment, lenders typically still require a completion guaranty from a principal, because an unfinished project is weak collateral. Completion and carve-out guaranties commonly survive as personal obligations on otherwise non-recourse deals.
How do I protect myself when signing a completion guaranty?
Build a meaningful contingency reserve (commonly 10% or more of the budget) so cost overruns don't come straight out of your pocket, use a fixed-price contract with a vetted general contractor, and manage the draw schedule and lien waivers tightly. The guaranty makes you the financial backstop, so disciplined project management is your best defense.