You may have noticed a new option on the checkout page — zero-interest financing. More online retailers are offering to finance large purchases with no interest charges. It sounds too good to be true, but is it?

Adrian found himself asking this question. He’s looking to buy around $10,000 worth of high-end camera gear, including a new body and lens, and the seller is offering 12-month financing at 0% interest. Adrian has been saving for this purchase and has the necessary cash, but is tempted to accept this offer. However, he is concerned that there is a catch — and that accepting the terms could come back to bite him.

Must Read

The use of zero-interest financing is on the rise, with nearly half (48%) of Americans stating that a 0% annual percentage rate (APR) option would influence their purchase decisions [1]. Before you use this option, there are a few things you need to know.

Common catches to zero-interest financing

If you have the money to pay off a purchase in full, there may be no harm in using zero-interest financing or buy now, pay later (BNPL). But this financing isn’t without its drawbacks. Here are two potential pitfalls you need to know.

Interest can be retroactive

That 0% financing likely only stays in effect if you pay on time, every time. Missing just one payment can trigger retroactive financing, meaning you’ll be charged interest on the entire purchase, not just on what you have left on the balance. And the interest rates are often extraordinarily high — more than 35% in some cases.

It’s training consumers to spend more

Research from the Harvard Business Review found that BNPL financing leads people to spend more than they intended [2]. Retailers aren’t offering this out of the goodness of their hearts — they anticipate that consumers will spend more. And the financing company is betting that enough consumers will miss a payment to make it worthwhile.

Read more: Want an extra $1,300,000 when you retire? Dave Ramsey says this 7-step plan ‘works every single time’ to kill debt, get rich in America — and that ‘anyone’ can do it

What to consider before using zero-interest financing

Before you click "agree" on a 0% financing plan, take a step back and run through a quick checklist:

If you’re confident you can stick to the payment schedule and the purchase fits your financial plan, 0% financing can be a useful tool — especially if you keep your cash in a high-yield savings account and earn a little interest while you pay off the balance.

The key is discipline. Zero-interest offers work in your favor only if you follow the rules exactly. Slip up, and what seemed like a free loan can quickly turn into one of the most expensive ways to finance a purchase.

What to read next

Join 200,000+ readers and get Moneywise’s best stories and exclusive interviews first — clear insights curated and delivered weekly. Subscribe now.

Article sources

At Moneywise, we consider it our responsibility to produce accurate and trustworthy content people can rely on to inform their financial decisions. We rely on vetted sources such as government data, financial records and expert interviews and highlight credible third-party reporting when appropriate.

We are committed to transparency and accountability, correcting errors openly and adhering to the best practices of the journalism industry. For more details, see our editorial ethics and guidelines.

[1]. Affirm. “Affirm research reveals impact of 0% APR financing ahead of holiday season”

[2]. Harvard Business Review. “How “buy now, pay later” is changing consumer spending”

This article provides information only and should not be construed as advice. It is provided without warranty of any kind.