You’ve most likely heard the rule: Save for a 20-percent down payment before you buy a home. The logic behind saving 20 percent is solid, as it shows that you have the financial discipline and stability to save for a long-term goal. It also helps you get favorable rates from lenders.

But there can actually be financial benefits to putting down a small down payment—as low as three percent—rather than parting with so much cash up front, even if you have the money available.

THE DOWNSIDE