Latest / Budgeting for Beginners with Fexingo: Cash Envelopes, Apps, and Simple Money Tracking / Budgeting When Your Income Changes Every Month
Transcript
- Lucas: So you've got your 50-30-20 split memorized, you've set up three cash envelopes, and then your paycheck shows up and it's three hundred dollars less than last month. What now? Luna: That is the exact moment most beginners throw their hands up and say 'budgeting doesn't work for me.' Lucas: Right. And it's not their fault. Most budgeting advice assumes a steady paycheck. But the Bureau of Labor Statistics estimates that roughly 36 million Americans have variable income — freelancers, gig workers, commissioned salespeople, even tipped workers. That's more than one in five workers. Luna: And a lot of them try a standard zero-sum budget — where every dollar is assigned a job — and it just breaks when the total changes. Lucas: Exactly. So today I want to walk through a system designed specifically for variable income. It's called the '70-20-10 with a buffer' approach, but we'll get to that in a minute. First, let me set up a concrete case. Luna: I love a concrete case. Who are we following? Lucas: Let's call her Lucy. She's a freelance graphic designer in Austin, Texas. Her monthly income over the past twelve months ranged from a low of $3,200 to a high of $5,800. Her baseline living expenses — rent, utilities, groceries, insurance — come to about $2,800 a month. Luna: So in a low month she brings in just $400 above her essentials? That's tight. Lucas: Tight is putting it mildly. And in a high month she might have $3,000 of surplus. The temptation is to treat that high month as the new normal and spend accordingly, only to get crushed the next month. Luna: That's the classic lifestyle creep trap, but for freelancers it's more like a roller coaster. Lucas: Right. So the first rule is: never budget based on your best month. Budget based on your worst month, or better yet, your average low month. For Lucy, that $3,200 month. Luna: But what happens with the extra money in the good months? It just sits there? Lucas: No, this is the key move. You build what I call an 'income buffer.' In Lucy's case, she takes the difference between her actual income each month and her base budget — say $2,800 — and puts that surplus into a separate savings account designated for months when income dips below the base. The FDIC in their 2025 report noted that households with variable income who maintained at least three months of such a buffer were 60% less likely to report financial stress. Luna: So you're essentially smoothing your own income. You're turning a lumpy stream into a steady one. Lucas: Exactly. Now let's talk about the 70-20-10 split. This is a variation of the 50-30-20, but it's designed for variable incomes. The idea is: 70% of your take-home pay goes to essentials and discretionary spending, 20% goes to savings and debt repayment, and 10% goes to what I call 'true expenses' — those annual or irregular costs like car insurance, holiday gifts, or a new laptop. Luna: But if the income changes every month, how do you calculate those percentages? Do you use last month's income? Lucas: Great question. You use your average income over the past six months. For Lucy, that average is about $4,200. So her 70% target is $2,940 for spending. But notice — that's close to her actual expenses of $2,800. So she's in good shape. Her 20% towards savings and debt would be $840, and her 10% for true expenses would be $420. Luna: What if the actual month's income is way below the average? Like a $3,200 month. Then the percentages would give you a spending target of $2,240, which is less than her $2,800 in fixed costs. Lucas: Right, and that's where the buffer comes in. She supplements her income from the buffer account to bring her available money up to the average level. So in that low month, she pulls $1,000 from the buffer to cover the gap. The high months replenish it. Luna: So the buffer is practically an emergency fund, but you're using it more regularly. Lucas: Exactly. It's a smoothing fund, not a true emergency fund. You still want a separate emergency fund for actual emergencies. This buffer is for the predictable irregularity of your income. Luna: Okay, I want to challenge something. You said 'never budget based on your best month.' But what about the pay-yourself-first method? Some experts argue that you should first take your savings out, then live on the rest. For variable income, that seems hard because you don't know how much you'll have. Lucas: It is harder, but it's not impossible. The trick is to set a fixed dollar amount you'll save each month, not a percentage. For Lucy, maybe she sets a goal of saving $500 a month. In a $5,800 month, that's easy. In a $3,200 month, she might only save $100. The key is consistency over time, not hitting the exact number every month. Luna: So you're saying a fixed target, but with flexibility to undershoot in low months as long as you overshoot in high ones? Lucas: Bingo. And I'd add that you should automate the transfer on the first day of the month based on whatever income you've already received. If you get paid weekly, you can do a weekly transfer. The point is to make it habitual. Luna: Let me bring in an example from my own life. When I was freelancing a few years ago, I used a cash envelope system for variable expenses like groceries and dining out. But I found that my envelope for 'fun money' would either be overflowing or empty depending on the month. Lucas: And that's frustrating because it feels like you're either depriving yourself or blowing it. The fix is to have a 'variable envelope' that gets funded from the buffer. You fill it with a consistent amount each month, say $200, regardless of income. The buffer absorbs the difference. Luna: So the cash envelope system can still work, but you need to decouple it from your actual monthly income. Lucas: Exactly. Now, what about budgeting apps? Most popular apps like Mint or YNAB are built for steady incomes. YNAB actually works well for variable income because it's based on the money you have right now, not projected income. But Mint's budgeting feature relies heavily on forecasting. Luna: I've heard some freelancers use a spreadsheet approach because they can customize the formulas. But let's be real — not everyone wants to build a spreadsheet. Lucas: Yeah, and that's fine. There's a simpler method: just use two checking accounts. One is your 'income account' where all your payments land. The other is your 'spending account' where you transfer a fixed amount each month — say $2,800 for Lucy. You never touch the income account except to transfer to the buffer or to the spending account. Luna: So the spending account acts like a monthly allowance. That's elegant. Lucas: It is. And the income account accumulates the surplus. Then every quarter you sweep the excess into the buffer and maybe into savings. Luna: Let's talk about the mental side of this. A lot of variable-income earners feel guilty spending money in a good month because they know a bad month is coming. Lucas: That's a real psychological burden. And it can lead to hoarding cash to an unhealthy degree. The antidote is to have a clear plan for the surplus. For Lucy, she might decide that in a month where her income exceeds $4,500, she'll put 70% into the buffer, 20% into long-term savings, and 10% into a 'treat yourself' fund that she can spend guilt-free. Luna: I like that. It gives permission to enjoy the good months while protecting the lean ones. Lucas: Exactly. And that's the whole philosophy: design a system that works with your income pattern, not against it. The worst thing you can do is pretend your income is steady when it's not. Luna: I'd add that this system also helps with tax planning for self-employed people. If you're setting aside part of the buffer for taxes, you're less likely to get hit with a surprise bill. Lucas: Great point. Lucy should absolutely have a separate tax account where she puts roughly 30% of each payment. That's another form of smoothing. The IRS expects quarterly estimated payments, but many freelancers just set aside the money and pay annually. Luna: So let me see if I can summarize this for someone listening. Step one: calculate your average monthly income over the last six months. Step two: set a base spending amount that's below your average, ideally equal to your essential expenses. Step three: build a buffer account by saving the surplus from good months. Step four: use the buffer to supplement your income in low months. Step five: optionally use a two-account system to simplify. Lucas: That's a perfect summary. And I'd add one more thing: revisit your average every quarter. As your income grows or changes, your base should adjust. Luna: So the system is not set-it-and-forget-it. It requires a bit of maintenance. Lucas: About ten minutes a month, honestly. And the payoff is less financial anxiety and more confidence in your spending decisions. Luna: One last question. What if someone's income is so variable that they can't even rely on a six-month average? Like a real estate agent who might have zero income for two months and then a huge commission. Lucas: That's a tougher case. For that person, I'd recommend a 'base-income' approach. They should determine the absolute minimum they can live on — say $2,500 per month — and then live on that every month, regardless of income. Any commission above that goes into savings and the buffer. They effectively treat their base as their salary. Luna: That takes a lot of discipline, but it's basically what many wealthy people do — they live below their means, even when their means are large. Lucas: Exactly. And it's the same principle: separate your income from your spending. The budgeting method is secondary to that mental separation. As long as you have that, you can make almost any system work. Luna: I think that's a great note to end on. For our listeners with variable income — you're not broken. You just need a different tool. Lucas: And now you have one. Next time we'll talk about how to automate this whole system so you barely have to think about it. Luna: Looking forward to it. Until then, keep your envelopes full and your buffer topped up. Lucas: See you next time.