Your down payment doesn't have to come entirely from your own savings account — but where it comes from matters enormously. The short version: gifts are usually fine, borrowed money usually isn't, and the line between the two is exactly what a lender will probe.
Gift funds: yes, with paperwork
Money gifted toward your down payment or closing costs is widely accepted. What the lender needs is proof it's genuinely a gift — not a loan in disguise. That means a gift letter, signed by the giver, stating the amount, the relationship, and that no repayment is expected. The lender will also document the transfer: where the money came from and where it landed (the paper trail, again).
Who's allowed to give it depends on the program. Conventional loans generally want gifts from family (and sometimes a fiancé or domestic partner); FHA is a bit broader. On many primary-residence loans a gift can cover the entire down payment — but confirm the rules for your specific loan.
Borrowed funds: usually not
Here's the firm line: you generally cannot borrow your down payment with unsecured debt. A personal loan, a credit-card cash advance, or "I'll pay you back later" money won't fly — because a hidden loan raises your DTI and shrinks your real stake in the home, which is the entire thing the down payment is meant to prove.
The gray area: secured borrowing
There's a meaningful exception. Funds secured by your own assets are often allowed, because you're not adding unsecured debt — you're tapping something you already own. Common examples: a 401(k) loan, a HELOC on a property you own, or a loan secured by your car or investment account. The payment on that secured loan still gets counted in your ratios, but the funds themselves can usually be used. This is program-specific, so check before you rely on it.
Don't disguise a loan as a gift
The one move to avoid completely: taking borrowed money and calling it a gift on the letter. That's misrepresentation — mortgage fraud — and it's not worth it. If someone is truly helping you, do it as a real gift, document it early, and let the funds season in your account.
Gift-source rules, gift-letter requirements, and which secured funds are allowed all vary by loan program — confirm the specifics with your loan officer before you move any money.