Should I use a personal loan to build an emergency fund?

The math problem: If you borrow $5,000 at 15% APR and put it in a high-yield savings account earning 4.5%, you pay 10.5 percentage points net per year on the spread. On $5,000, that is $525/year in negative arbitrage. Holding borrowed cash in savings almost never makes economic sense.

Why people consider this: The appeal is 'having money if something goes wrong.' But if you have a personal loan to repay, the monthly payment itself becomes a fixed obligation that increases financial stress in a crisis.

When a limited exception might apply: You have zero savings and your income is genuinely precarious. You can borrow a small amount ($1,000-$2,000) at a manageable rate and pay it off quickly. The monthly payment is small enough not to strain your budget. In this narrow scenario, having $1,000 in savings while paying $30/month on a loan might prevent a $200 overdraft fee plus a payday loan cycle - the math can work for very small amounts.

Better approaches to building an emergency fund: Automate savings from each paycheck - even $25/month compounds to $900 over 3 years. Redirect a portion of the next raise or bonus directly to savings. Use a tax refund to seed the fund. Take on temporary extra income (freelance, side gig) specifically to build the fund. Pause discretionary spending for 3-6 months to fund the account.