A pre-approval letter says you're qualified to borrow up to a certain amount based on income, assets, and credit. A mortgage commitment letter—sometimes called a conditional approval or loan commitment—goes several steps further. It means an underwriter has reviewed your full file, the property has been appraised, title work is underway or complete, and the lender has committed in writing to fund your loan, subject only to a short list of final conditions. The distinction matters because sellers, attorneys, and closing agents treat them very differently.
What a pre-approval covers
Pre-approval happens early. You submit pay stubs, bank statements, tax returns, and a credit authorization. The lender or broker verifies your income and assets, pulls your credit, and issues a letter stating the maximum loan amount and program you qualify for. That letter is conditional: it assumes you'll find a property that appraises, that you'll remain employed, that your credit and assets won't materially change, and that underwriting will confirm everything when you go under contract. Most sellers require a pre-approval before they'll consider your offer, but they know it's not a final green light.
What triggers a commitment letter
Once you're under contract, the process shifts. You submit a purchase agreement and the property address. The lender orders an appraisal and title search. An underwriter reviews your documentation in detail, compares the appraised value to the purchase price, checks title for liens or easements, and issues conditions—items like a letter explaining a recent deposit, updated pay stubs, or homeowners insurance binder. When you satisfy those conditions and the underwriter signs off, the lender issues a commitment letter. It states the loan amount, program, and any remaining conditions that must be met before closing, such as a final employment verification or recorded deed.
Why the difference matters
Sellers view a commitment letter as near-certain. It means underwriting is complete, the property appraised at or above contract price, and only routine final steps remain. Attorneys and title companies rely on the commitment to schedule closing and prepare documents. A pre-approval, by contrast, leaves substantial risk that financing could fall through during the contract period. In competitive markets, an offer backed by a commitment letter—rare but possible if you've already started the process on another property or arranged early underwriting—carries measurably more weight than one backed by pre-approval alone.
Conditions that remain
Even a commitment letter is conditional. Typical remaining conditions include final employment and asset verification within 24 hours of closing, proof that you've transferred the down payment to the closing agent, recorded deed and mortgage, and a satisfactory final walk-through. The commitment protects the lender if material circumstances change before closing—job loss, new debt, or property damage—but absent those changes, it represents a binding obligation to fund.
The Alliance take
Understand which document you hold and what it guarantees. A pre-approval gets your offer considered; a commitment letter gets you to the closing table. If you're competing for a property, ask whether early underwriting or a faster appraisal timeline can move you closer to commitment before your offer deadline. Start an application to begin the process and clarify where you stand.
Consult a CPA or attorney; this is not tax or legal advice.