The quote for a leaking roof arrives on Tuesday, the contractor adds a second line for rotted boards on Thursday, and the final invoice lands a week later. Borrowing a single round sum on Monday means paying interest on money that sat unused for days. Drawing against a line of credit as each bill is confirmed means the interest follows what you actually took. That difference, more than the advertised rate, is what separates these two products, and it is why the question is less about which is cheaper and more about whether you already know the final number.

One pays out once, the other stays open

An installment loan deposits the full amount in one go and then amortises it over a set number of months. You know the payment, the term and the last date from the start, which makes it easy to fit into a household budget. A personal line of credit sets a ceiling instead of handing over cash. You draw what you need, when you need it, up to that ceiling, and the available amount shrinks with each draw. During a draw period that commonly lasts a few years, some agreements ask for interest only on the drawn balance, while others ask for a small share of the principal as well.

Interest follows a different number

On an installment loan, interest accrues on the whole amount from the day the funds arrive, whether or not you have spent them yet. On a line of credit, it accrues on the amount drawn. If you take 2,000 dollars from a 10,000 dollar line and leave the rest untouched, the interest is worked out on 2,000. That sounds like a clear saving, but lines often carry a higher rate than a fixed installment loan, and the rate on a line is frequently variable. A higher rate on a smaller balance can still beat a lower rate on a large one, but only if you run the numbers with real dates rather than assuming it does.

A closed cheque book, plain envelopes and a ceramic cup on a linen tablecloth

Repayment has a different shape too

A fixed-term loan ends on a known date. Pay it on schedule and the balance reaches zero, the account closes, and that is that. A line of credit can stay open after you clear it, which is useful for the next unexpected bill and awkward for anyone trying to stop borrowing. Once the draw period ends, many agreements move into a repayment phase where further draws stop and the outstanding amount is amortised, sometimes at a different rate. Ask when that switch happens and what the new payment would be on the balance you expect to carry, because a low interest-only payment can jump sharply on that date.

Fees that sit outside the rate

Both products can carry charges the rate does not show. An installment loan may have an origination fee, often in the region of roughly 1% to 10% of the amount borrowed, taken out before the funds reach you. A line of credit may have an annual fee, a fee per draw, or a charge for keeping the account unused. Add each one to a single sheet of paper and compare the total cost of the same amount borrowed over the same number of months. APR helps with an installment loan; with a line, the annual fee and the draw schedule belong in your own arithmetic.

When the lump sum still wins

If the price is settled and the work starts next week, an installment loan is usually the simpler instrument. One deposit, one payment, one end date, and no temptation to draw again. A line earns its keep when the total is genuinely unknown, when bills arrive in stages, or when you want a buffer you may never touch. Borrowing capacity on personal loans commonly runs from about 1,000 to 50,000 dollars, with lines often starting smaller. Funding on either product frequently takes one to seven business days, so a line is not a same-day rescue for a bill due tomorrow.

  • Write down the final cost if you know it; a known figure argues for one lump sum.
  • Ask for the rate on drawn amounts, the annual fee and any per-draw charge as separate lines.
  • Find the date the draw period ends and calculate the payment that follows it.
  • Check whether an unused line still costs something each year.

Can you repay a line early?

Usually yes, and clearing the balance restores the available amount, which is exactly the feature that makes a line helpful and risky at the same time. Some agreements charge an early-termination fee if you close the account within a set window, so ask before you open one with the intention of shutting it quickly. Prepayment rules differ from those on a fixed-term loan, and the clause is easy to miss because it sits near the account-closure section rather than the rate section.

Amounts, terms, draw periods and fee rules vary by lender and by the written agreement, so treat every figure here as an illustration. Nothing on this page is financial advice and no outcome is guaranteed. Compare firm offers rather than advertised ranges, and keep a note of the date each draw was made so the interest calculation can be checked later.

Does applying for a line hurt my credit file?

A lender usually makes a hard inquiry when you apply, which can cost a few points and tends to fade within about a year. Some lenders offer a soft check first to show indicative terms, and asking whether that option exists is worthwhile. The account itself may later appear on your file with its limit and balance, so an unused line is not invisible to the next lender.