Generally no. Pricing keys off your credit score and loan-to-value, and a smaller down payment earns you no rate reward. The idea usually comes from online rate tables. A generic web calculator doesn't disclose where its numbers come from and isn't a real pricing engine, so we wouldn't lean on it. Your actual rate is set by loan-level price adjustments, which key off credit score and loan-to-value. In practice, the difference between something like 3% and 5% down is often an eighth of a point or less, small enough that it rarely changes a decision. One counterintuitive wrinkle worth knowing: putting 15% down can sometimes price slightly better than 20% down. At 15% you carry mortgage insurance, and your equity plus that MI coverage can give the lender more effective protection than 20% down with no MI. There have also been short windows, after pricing-adjustment changes, where certain lower-down scenarios briefly priced better. That's the exception, though, and no strategy to build around. Choose your down payment based on your cash reserves, whether you want to carry mortgage insurance, and the payment you're comfortable with. If you want to see the actual pricing on your scenario at a couple of different down payments, that's easy for us to pull on a Roadmap call.