Plain-language definition
What does Buydown mean?
A payment made to reduce a borrower’s mortgage rate or payment for a period. It may be funded by a builder, seller, lender, or borrower, subject to lender rules.
Practical significance
Why it matters in a mortgage file
It matters because small changes in assumptions can materially alter payment, qualification, equity and total borrowing cost.
The exact treatment depends on the lender, property, borrower profile, transaction structure and governing documents. A term used conversationally may be narrower or broader than the meaning used in a commitment, registered charge, appraisal, insurer guideline or statute.
For the broader transaction framework, read Construction, Renovation and Self-Build Financing.
Underwriting perspective
How professionals apply the concept
In underwriting, buydown is not reviewed in isolation. The professional must identify the source document or policy controlling the term, verify the underlying facts, assess how it affects risk or qualification, and document any exception or assumption. For legal, tax, accounting or appraisal questions, the appropriate professional's opinion should control.
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This entry is general educational information. Mortgage rules and lender policies can change, and the result depends on the complete application and transaction. It is not legal, tax, accounting, appraisal, investment or financial advice.