You can change your down payment before closing, and lenders deal with this constantly. The number you put on your application was an estimate, and moving it up or down is allowed as long as you still qualify for the loan under the new math. What matters is understanding what that change sets off: your interest rate pricing, your rate lock, your mortgage insurance, your closing date, and your contract with the seller can all shift because of it.
Why You Might Be Changing It
Most down payment changes come from one of two places. The first is your own choice. You decide to put more down to clear the 20% threshold and avoid mortgage insurance, or you decide to put less down to keep cash in reserve for repairs, furniture, or an emergency fund.
The second is the appraisal. If the home appraises for less than what you agreed to pay, the lender bases your loan on the lower appraised value, not the contract price. Fannie Mae’s guidelines are explicit: the property value used in the loan-to-value calculation is the lower of the sales price or the appraised value.1Fannie Mae. Loan-to-Value (LTV) Ratios
Here is how that plays out. You agreed to pay $450,000 with a $45,000 down payment and a $405,000 loan. The appraisal comes in at $425,000. The lender will only lend against $425,000, so your maximum loan at 90% LTV drops to $382,500. To still buy the house at the contract price, you now need $67,500 in cash instead of $45,000. Your options are to bring the extra cash, renegotiate the price with the seller, or walk away if your contract still has a live appraisal contingency. If you signed an appraisal gap coverage clause, you already committed to covering some or all of that difference yourself.
What Changes on Your Loan When the Down Payment Moves
The 20% PMI Threshold
The biggest single consequence is crossing 20% in either direction. Drop below 20% on a conventional loan and you trigger private mortgage insurance. PMI typically runs between 0.46% and 1.50% of your loan amount per year, driven by your credit score and your down payment size. On a $300,000 mortgage, that is roughly $115 to $375 per month.2Freddie Mac. Private Mortgage Insurance (PMI) Calculator Push your down payment up to 20% and the cost disappears, which is why so many buyers increase their down payment in the final weeks.
Interest Rate Pricing Tiers
Your rate is not a single number tied to your credit score. Lenders apply loan-level price adjustments based on both your score and your LTV, and those adjustments change at specific LTV cutoffs like 80%, 85%, and 90%. A borrower with a 740 credit score moving from 80% LTV to 85% LTV picks up an extra 0.125% in pricing adjustments on a Fannie Mae loan.3Fannie Mae. LLPA Matrix A small change to your down payment can quietly shift your rate if it pushes your LTV across one of these tiers.
Your Debt-to-Income Ratio
A smaller down payment means a bigger loan, a bigger monthly payment, and a higher DTI. Most conventional lenders cap total monthly debts between 43% and 50% of gross monthly income. If reducing your down payment pushes your DTI past the ceiling, the lender will deny the change. This is where reduction requests fail most often, especially for buyers who were already close to the qualification line.
The Conforming Loan Limit
Reducing your down payment increases the loan amount, and a bigger loan can tip you over the conforming loan limit. For 2026, that limit is $832,750 for a single-unit property in most of the country, and $1,249,125 in designated high-cost areas.4FHFA. FHFA Announces Conforming Loan Limit Values for 2026 Crossing that line kicks you into jumbo territory, which usually means stricter qualification, a higher rate, and sometimes a larger required down payment. If you are buying near the limit, a modest reduction can change the kind of loan you have entirely.
Your Rate Lock May Not Survive the Change
A rate lock holds your interest rate steady between the lock date and closing, but the lock comes with conditions, and one of the most common is that your loan amount and down payment stay put. The Consumer Financial Protection Bureau puts it plainly: if you change the amount of your down payment, your locked rate may no longer apply.5Consumer Financial Protection Bureau. What’s a Lock-in or a Rate Lock on a Mortgage?
Losing the lock is not automatically bad. If rates have fallen since you locked, a re-lock can even help. If rates have climbed, re-locking at the current market can cost thousands over the life of the loan. Before you request the change, ask your loan officer specifically what it does to your lock. Some lenders allow small adjustments within the same LTV tier without breaking the lock; this is a policy decision, not a legal one, so the answer depends on who you borrowed from.
How It Affects Your Closing Date
A down payment change forces a revised Closing Disclosure, and federal rules control when you can actually close after that revision. Under the TILA-RESPA integrated disclosure rules, you must receive your Closing Disclosure at least three business days before closing. If the change causes the disclosed annual percentage rate to become inaccurate by more than 1/8 of one percentage point (0.125%), the lender must issue a corrected disclosure and a new three-business-day waiting period starts before you can sign.6eCFR. 12 CFR 1026.19 – Certain Mortgage and Variable-Rate Transactions
Switching loan products or adding a prepayment penalty triggers the same three-day reset.6eCFR. 12 CFR 1026.19 – Certain Mortgage and Variable-Rate Transactions If the APR stays within tolerance, you still get a corrected Closing Disclosure, but it can come at or before closing without an extra wait.
In practical terms: a large down payment change in the final week before closing can push your closing date back by three or more business days. Finalize your number as early as you can, and treat the last week before closing as a no-change zone unless you are prepared to accept a delay.
Your Contract With the Seller Is a Separate Problem
Your purchase contract is its own agreement, and financing changes can create trouble on that side even when the lender is fine. Most contracts contain a financing contingency that names the loan type, the loan amount, and a deadline for securing approval. If your down payment change forces you to switch loan programs, miss the financing deadline, or fail to qualify for the loan described in the contract, the seller may have grounds to cancel.
Your earnest money is what is actually on the line. Before the financing contingency expires, you can usually walk away and get the deposit back if the loan does not come together. After that date, the deposit typically goes hard, which means the seller keeps it if you fail to close. A down payment change that triggers re-underwriting and pushes you past the contingency deadline puts that money at risk. Neither side owes the other flexibility on these dates, so if the change is going to affect your timeline, tell your lender and the seller’s agent immediately and get any extension in writing.
What Your Lender Will Need From You
Start by calling your loan officer or processor directly. Come in with the exact dollar amount you want to change to and the account the money is sitting in. Precision speeds up the review.
Plan to provide updated bank statements for at least the most recent two months. The lender needs to see that the funds exist, that they have been in the account long enough to count as stable, and that there are no unexplained large deposits. If the extra money is a gift, you will need a signed gift letter stating the amount, the donor’s relationship to you, and that no repayment is expected. If the funds come from a source not already in your file, such as liquidated investments or an inheritance, a short written explanation of the source helps the underwriter clear it quickly.7Financial Crimes Enforcement Network. Anti-Money Laundering Program and Suspicious Activity Report Filing Requirements for Residential Mortgage Lenders and Originators
Having the cash is not enough on its own. Lenders also verify that you have enough liquid assets left after closing to cover several months of mortgage payments, and these reserves are measured against the total cash you need at the table.8Department of Housing and Urban Development (HUD). FHA Single Family Housing Policy Handbook FHA loans require two months of principal, interest, taxes, and insurance in reserve for certain one-unit properties. Conventional reserve requirements vary with property type and the number of financed properties you own. If pushing your down payment higher would drain your accounts below the reserve threshold, the lender will reject the change no matter how much equity it would create.