At first, it seemed brilliant.
It was our simple little rule for handling the unexpected — a built-in pause button for those surprise expenses that always seem impossible to budget for. We even padded our monthly spending with a small cushion to make room for these surprises.
Here's the rule: Anytime one of us wanted to spend more than $100 on something outside the usual — a want, a whim, a surprise expense — we'd run it by the other person first. It was an easy rule that we both easily followed.
And for a while? It worked!
"The boys grew in their sleep, and none of their shoes are fitting. I'm gonna swing by the store and pick up a few new pairs for each of them."
"The disposal broke; it's going to be $110 to replace it."
"The vet says the dog desperately needs a dental cleaning. It's $180, but they throw in a free toothbrush."
And then my husband picked up a new and exciting hobby — restoring a 2001 Mazda Miata.
Suddenly, "a few occasional purchases" turned into "three different part orders in the same week" and "I'm just going to swing by Harbor Freight and pick up some new sockets and an air compressor." And our perfectly good system... fell apart.
Every time he found something new that needed to be repaired or replaced — which, in the early days, was often — he'd come to me and say, "Hey, so the sway bar has completely rusted. I found one that's not too expensive. Are you cool if we do that this month?"
And I'd be stuck with the final vote. Again. And again. And again.
Sometimes I said yes. Sometimes I suggested holding off. But every time, I felt like the killjoy.
Like I was some kind of "CFO of No."
And it wasn't just me. Oh no, my husband hated it, too. Hated feeling like he needed permission to do something that brought him real joy. Hated that every time he got excited about a new upgrade, he had to check in with "Mom."
Neither of us liked the roles we'd been pushed into. And we were both starting to feel fed up with the role the other played, as well.
And that was the moment I realized the system wasn't working anymore. Not because it was wrong, but because it didn't fit the reality of what we were doing now.
We needed a new system. One that stopped pitting us against each other… that emphasized how we were on the same team, rooting for the other's projects and successes.
So we made one.
Our Money Solution and Why It Works (Not Just for Car Parts)
We set aside a car fund. A fixed amount that we both felt good about, knowing it was enough to cover the projects he wanted to work on without derailing our bigger goals. That fund became his to manage, spend, or stretch however he wanted for the next six months.
No more check-ins. No more permission-seeking. No more guilt.
Just the two of us, back on the same team — me cheering him on, him enjoying the ride.
It changed everything.
It's easy to think the solution to money conflict is better communication. And yes, sometimes that's true. But sometimes? The communication is fine. The structure is the problem.
Because here's the truth: Even in a relationship where every dollar is shared and communication comes easily, you still need room to be your own person. You still need autonomy. Especially when it comes to joy.
When we set up that car fund, we weren't just creating a spending account. We were creating emotional space. Freedom. A tiny little box where financial individuality could live without disrupting our shared priorities.
That's the real power of systems like this — they reduce friction and increase trust.
Want to Try It? Here's How
If you've been running into friction around spending — or just want to bring a little more ease into your shared finances — here's how to try this for yourself.
1. Name the friction. Where is money creating resentment? What purchases feel like tension points? Don't skip this step — it's important to know what you're solving for.
2. Create a fund with boundaries. Pick an amount that won't sabotage your bigger goals.
This could be a shared "fun fund," or individual monthly spending accounts. (We've done both over the years.) The key is that once the money is in there, it's no longer up for discussion.
3. Get specific about the rules. Does the fund reset every month or roll over? Can it be used for anything, or only for specific kinds of spending? Do you want to track what gets used, or is it "hands off" once it's funded? Get clear early to avoid confusion. And be sure both of you go into this step with an open mind; the point is to come up with a structure everyone is happy with so that it doesn't become a point of contention in the future.
4. Automate it. Set a recurring transfer. Treat it like any other bill. The beauty of automation is that it normalizes the behavior — you're not "allowing" spending; you're planning for it.
5. Honor the limit/rules. This is the hardest part. When it's gone, it's gone. No top-ups. No "just this once." That's how you protect your system (and your trust).
6. Celebrate the freedom. This is where the magic happens. Because suddenly, those purchases don't feel like stress points. They feel like tiny declarations of joy — made possible by a system designed for exactly this.
Letting Go of the Guilt
Money can so easily turn into a battleground.
Even when you're doing everything right — talking about it, planning for it, checking in — it's easy to end up in roles you never meant to play. The gatekeeper. The over-spender. The one who always says no. The one who always asks.
But the problem isn't you. (Or your spouse.) It's not even the money.
It's the structure you're using — and whether it actually fits the life you're living.
So if your system is creating friction, don't be afraid to change it! Try something new. Test. Adjust. Create space.
Because the real goal of money management isn't just control. It's freedom — to live a life you love, with the people you love, without resentment clouding the ride.