A Simple Alternative to YNAB

YNAB works. If you've got the time and the temperament for it, giving every dollar a job is a genuinely good way to budget. It's also a lot of app: dozens of categories, a rule system, and a couple of weeks to get comfortable.

If what you want is to know how much you can spend this month, without running a category system to find out, there's a simpler shape. One number. Here's how the two compare, and how the one-number version works.

What YNAB gets right

Give YNAB its due. The whole method is that every dollar you earn gets a job before you spend it: rent, groceries, the car fund, fun money, all of it assigned. Overspend one category and you move money from another, facing the trade on the spot. That builds a real discipline, and for people who stick with it, it can change how they handle money for good. YNAB doesn't sell your data, it's been at this since 2004, and it has one of the most devoted communities in personal finance. That's a good tool, and none of it is in question here.

Where it asks a lot

Here's the part that tends to get undersold. YNAB has a learning curve, usually a couple of weeks before it clicks, and the category system is something you tend constantly. Every dollar in a job means every dollar is a decision, then a re-decision each time life moves the money around. If that control is what you want, that's the appeal. If you mostly want to know whether you can afford dinner out on Thursday, it's a lot of overhead for the answer.

If you tried YNAB and drifted away from it, the usual reason is upkeep: it asks for more day-to-day tending than you wanted to give it. Plenty of people want the number without the system.

The one-number version

Left Unspent and YNAB share a core thread: don't spend money that's already committed. Both start by accounting for every dollar. They part ways on what happens next. YNAB sorts those dollars into categories you manage all month. Left Unspent lands them on one number.

You enter your income, your fixed costs, and what you set aside for the bills that aren't monthly. What's left is your One Number, the money you have left unspent this month. (The walkthrough runs the subtraction with real figures.)

Then you spend against it with one card. Put your discretionary spending on a single card, pay it off monthly, and check the balance against your number. There's nothing to fund and nothing to rebalance when you go over in one spot, because there's only one spot. The whole system is one number and one balance to hold it against.

What you give up

The tradeoff is control. YNAB lets you steer at the category level: cap groceries apart from gas, watch each one, move money between them on purpose. Left Unspent pools all of that into a single number, so the per-category walls go away. If steering each category is the part you like, YNAB will give you that granular control. If those walls felt like busywork, one number is the lighter way to stay on track.

See your number

You can find your One Number on paper, or drop your income, fixed costs, and set-asides into our calculator and have it in about a minute. No account, no learning curve.

When you want it to keep running, the app holds your number month to month and gives you the one figure to check your card against. Personal is $9 / month or $79 / year, with a 14-day trial and no card to start. For reference, YNAB runs $14.99 / month or $109 / year.

Want the full side-by-side against YNAB, Monarch, and the rest? Here's the comparison.

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