Financial therapist Dr. Erika Rasure told Cosmopolitan that financial infidelity “is when someone intentionally keeps money or financially related information from a partner.” And, she adds, “Lying by omission counts too.”

Bankrate's survey of adults who are married, in a civil partnership or living with a partner found these were the most common forms:

Smaller habits can count too. Rasure mentions being dishonest about prices, always rounding down, hiding receipts or shopping bags, and quietly giving money to family members.

Plenty of people think so. In the same Bankrate survey, 45% of people who were married or living with a partner said keeping financial secrets is as bad as or worse than physical infidelity: 38% said equally bad and 7% said worse. A third (33%) said it's not as bad.

Whether or not you call it cheating, the useful frame is trust. Rasure points out that money is tied to safety and the future you're building together, so a hidden debt can hurt both emotionally and practically. It can also make a partner wonder what else they don't know.

You don't need your partner's approval for every coffee, and having your own money is healthy. In Bankrate's survey, 62% of coupled adults kept at least some money separate, and 27% kept it completely separate. Separate accounts aren't infidelity.

Rasure draws the line clearly: “Privacy is something you've agreed on together. Secrecy is something you're actively managing, so your partner won't find out.”

A quick gut check: if you're curating what your partner sees, timing purchases for when they're out, or feeling a jolt of panic when the statement arrives, it has probably tipped from privacy into secrecy.

None of these proves anything on its own; they are reasons to talk, not evidence.

If you notice a pattern, don't go through their phone or accounts. Snooping tends to make trust worse on both sides. Ask directly and calmly instead. Our tips on bringing up finances with your partner can help you start.

Usually it's not really about the money. Rasure says financial infidelity is often rooted in shame and embarrassment: worry that debt will make someone look irresponsible, or a spending habit that feels out of control. It can also be a way to protect independence when money decisions don't feel equal, or a pattern learned growing up, for example if your family criticised how you spent money.

Bankrate's later survey asked people in committed relationships who don't share all their financial information why. More than a quarter (28%) said they should be allowed to keep some things to themselves, 15% said they didn't want their partner to know and 14% said they'd be embarrassed. The largest share (43%) believed their partner simply wouldn't care.

When it can be a sign of something bigger

Sometimes secret money points to a bigger problem. One partner may be controlling all the money, restricting access or running up debt in the other's name, which is a form of financial abuse. A secret can also hide gambling or compulsive spending.

Coming clean is hard, and doing it on your own terms is far better than being found out. Rasure's advice is to own the impact without spiralling into shame.

1. Get the full picture first. Gather the numbers: what you owe, to whom and how it happened. A partial confession followed by another surprise does more damage.
2. Pick a calm, private moment, not the middle of an argument.
3. Say it plainly. “I need to tell you something I've been hiding, and I'm sorry. I have about $4,000 on a credit card you don't know about. I kept it from you because I was embarrassed, and I know that wasn't fair to you.”
4. Let them react. They may need time. Don't rush them to forgive you.
5. Bring a plan, like a payoff schedule, and offer full transparency going forward.

Rasure puts it this way: “The partner who kept the secret needs to own the impact without spiraling into shame, and the partner who discovered it deserves space to feel hurt. Both can be true at the same time.”

Once the first conversation has happened, build a system together:

For practical ideas, see our guides to managing money better as a couple and avoiding fights about money. Be patient with the process. As Rasure says, “Trust is rebuilt through consistency over time, not one big conversation.”

What is financial infidelity?

Financial infidelity is intentionally hiding money information from a partner you share finances or a future with, such as secret debt, a hidden credit card or account, or lying about spending.

Is hiding purchases from your partner cheating?

Many people see it that way: in a Bankrate survey, 45% of adults who were married or living with a partner said financial secrets are as bad as or worse than physical infidelity. Whatever you call it, it's a breach of trust, and small, repeated hiding can add up.

How common is financial infidelity?

In a Bankrate/YouGov survey, 40% of US adults who were married, in a civil partnership or living with a partner said they had committed financial infidelity, most commonly overspending, secret debt or a secret credit card.

What's the difference between financial privacy and secrecy?

Privacy is something you've agreed on together, like separate accounts or personal spending money. Secrecy is something you actively manage so your partner won't find out.

Can a relationship recover from financial infidelity?

Yes, many do. It takes full honesty, room for the hurt partner's feelings, a shared money system and consistency over time. A financial or couples therapist can help.

How do I tell my partner about hidden debt?

Gather the full picture first, choose a calm moment, say it plainly and apologise without excuses. Let them react, and bring a concrete plan for paying it off and staying transparent.