Where the 20% number comes from
Putting 20% down lets you skip private mortgage insurance (PMI) on a conventional loan. That is it. It was never a minimum — it is the threshold where one line item on your payment goes away. Somewhere along the way "no PMI at 20%" became "you need 20%," and a generation of buyers waited.
What the real minimums look like
Conventional loans allow as little as 3% down for qualified first-time buyers. FHA is 3.5%. VA and USDA are $0 down for eligible buyers. On a $350,000 home, 3% is $10,500 — a very different savings goal than $70,000.
What PMI actually costs
Mortgage insurance is a monthly cost, but it is usually smaller than people fear, and on a conventional loan it goes away once you reach 20% equity through payments and appreciation. The question is not "can I avoid PMI?" — it is "does paying a bit of PMI now beat renting for three more years while I save?" For most buyers, the math says buy.
The honest trade-off
Less down means a bigger loan, a higher payment, and PMI until you reach 20% equity. More down means a lower payment but less cash left over for moving, furniture, and the emergency fund every new homeowner needs. There is no universally right answer — there is only the right answer for your numbers, which is a ten-minute conversation.
