Latest / Budgeting for Beginners with Fexingo: Cash Envelopes, Apps, and Simple Money Tracking / How to Budget for Seasonal Income Fluctuations
Transcript
- Lucas: If your paycheck looks different every single month — and you're nodding along — then most budgeting advice you've heard was written for someone else. Luna: Yeah, the classic 'split your income into 50 percent needs, 30 percent wants, 20 percent savings' assumes a steady number to split. Lucas: Exactly. And for a huge and growing slice of workers — freelancers, gig drivers, commissioned sales, seasonal hospitality, even real estate agents — that number is anything but steady. So today I want to walk through a specific system built for variable income, using a real example. Luna: I'm in. Who's the example? Lucas: A freelance graphic designer in Austin named Mia. She's been fully self-employed for about three years. Her monthly income over the past twelve months ranged from a low of $3,400 to a high of $9,200. So her average is around $5,800, but the average is almost meaningless when the actual number swings by two or three thousand dollars month to month. Luna: Right, because if you budget based on the average, you're over-committed in the low months and you feel like you have 'extra' in the high months that really should be reserved. Lucas: Bingo. That's the core trap. So what Mia does — and what I think is the cleanest approach I've seen — is she starts by figuring out her 'base-expense floor.' That's the minimum dollar amount she needs every single month to keep the lights on, pay rent, buy groceries, cover her health insurance premium, and meet her minimum debt payments. Luna: How did she land on that number? Lucas: She went through her bank statements from the last six months, pulled out every recurring or predictable expense, and added them up. It came to $2,800. That's her floor. Everything above that is, in her mind, 'surplus' — even though in a high-income month that surplus can be huge. Luna: So in a $9,200 month, she's got $6,400 above floor. That's not disposable income in the normal sense. Lucas: Exactly. And this is where the second piece comes in. Mia treats her surplus in a specific order. First, she fills a 'buffer account' — a separate savings account that acts like a shock absorber. Her target is three months of base expenses, so $8,400. That way, if she hits a $3,400 month, she can pull from the buffer to cover the gap without stress. Luna: And the buffer isn't her emergency fund — it's specifically for income smoothing. Lucas: Right. She actually has a separate emergency fund for true emergencies — car repair, medical bill. The buffer is just for normal life when income dips. Once the buffer is full, any surplus beyond that in a high month gets split: half goes to long-term savings or investments, and the other half goes to guilt-free spending — travel, eating out, whatever. Luna: So the low months are basically pre-funded by the high months. That's a different mental model than the usual paycheck to paycheck envelope system. Lucas: Totally. And a lot of people think they need an elaborate app to pull this off, but Mia does it with two accounts and a simple spreadsheet. One checking account for her base expenses, one savings account for the buffer. Every time a payment comes in, she immediately transfers enough to cover the base expense account for the month — leaving the rest in her business checking until she decides how to allocate the surplus. Luna: What about variable expenses that aren't monthly, like car insurance every six months or an annual subscription? Lucas: Good catch. Mia includes those in her base-expense floor on a prorated monthly basis. So her $2,800 floor includes a line item for 'annual bills' — she divides the yearly total by twelve and sets that money aside each month. It's the sinking fund idea we've talked about before, but applied to irregular income specifically. Luna: I think the hardest part for someone with variable income is the psychological whiplash. One month you feel flush, the next you're counting pennies. Lucas: Absolutely. And the buffer makes that easier, but there's another tactic Mia uses: she has a 'fun money' envelope — literal cash — that she fills only in months when her surplus is above a certain threshold. In low months, that envelope stays empty, and she just doesn't spend on non-essentials. The envelope being empty is visual and honest. Luna: That's interesting because a lot of people would try to maintain the same lifestyle every month and dip into savings or credit cards. The empty envelope forces a real adjustment. Lucas: Exactly. And the key insight is that her base-expense floor — $2,800 — is actually lower than her average income. So over time, the buffer grows, and she's saving consistently. She's not relying on willpower; she's relying on a system that separates predictable costs from variable wants. Luna: I want to ask about the tracking side. You mentioned a spreadsheet — is that enough, or does she use an app? Lucas: She started with a spreadsheet, but she now uses a simple budgeting app that lets her categorize income as it comes in. The key feature she looks for is the ability to set target amounts per category that roll over month to month — so if she underspends on groceries in a low month, that money stays available. Luna: Right, because with variable income, you can't just reset to zero each month. Lucas: Exactly. And I think that's the biggest takeaway for anyone listening whose income bounces around. You need a system that acknowledges the variability, not one that pretends it doesn't exist. The base-expense floor, the buffer, and the surplus allocation — those three pieces give you a framework that works whether you made three grand this month or nine. Luna: It reminds me of something we hear from listeners a lot — that they feel guilty spending in high months because they know a low month is coming. How does Mia handle that? Lucas: She's very deliberate about it. Once the buffer is full — and we're talking three months of expenses — she gives herself permission to spend half of any surplus above that. Because if you never enjoy the high months, what's the point? The system is designed to let you feel secure in the lows and still celebrate the highs. Luna: That's a healthy approach. And it's very different from the typical advice to just 'save more,' which is useless when you don't know how much is coming in. Lucas: Totally. And speaking of practical systems, I want to mention something that keeps this show going without ads or sponsors. A handful of listeners chip in monthly through buy me a coffee dot com slash fexingo, and that's literally what funds making episodes like this one. If the budgeting conversations we've had have helped you think about your money differently, that's the place where you can support the show. It's not a big ask — just knowing it's there keeps us focused on making content that's actually useful. Luna: Yeah, and it's nice that we don't have to shoehorn in a mattress or meal kit ad. The listener support model keeps it honest. Lucas: Exactly. So — back to Mia. I want to walk through a specific scenario. Say it's January, a low month for her — she bills $3,400. Her base expenses are $2,800. That leaves $600. She doesn't touch the buffer because $600 covers the gap partially; she actually pulls $200 from her buffer to cover the full month. The buffer drops from $8,400 to $8,200. Luna: And then in February she gets a big project — $8,500. She covers her $2,800 base, then uses the remaining $5,700 to refill the buffer back to $8,400 — that's $200 — and the remaining $5,500 is surplus. Half goes to her investment account, half to fun money. Lucas: Exactly. And over the course of a year, that rhythm keeps her buffer stable and her savings growing. She's not trying to predict income — she's just reacting to what actually arrives, with clear rules. Luna: I think the hardest part for most people is calculating that base-expense floor honestly. It's easy to underestimate the little things — like coffee runs or transit fares — that add up. Lucas: That's why Mia suggests tracking every dollar for one or two months before setting the floor. She used a free app just to see where money went. She was surprised that her 'small' categories — takeout, streaming, random Amazon purchases — totaled over $400 a month. So she included those in her base, because they were genuinely recurring. Luna: So her floor isn't just bare-bones survival — it's her actual typical low-month spending. Lucas: Exactly. And that's crucial. If you set the floor too low, you'll feel deprived and the system will fail. If you set it too high, you'll never feel like you have surplus. The floor has to reflect your real minimum lifestyle — not an idealized frugal version. Luna: What about someone who has irregular income and also irregular expenses — say, a freelancer who pays quarterly estimated taxes? Lucas: Great question. Mia handles that by treating quarterly taxes as a base expense on a monthly prorated basis. She estimates her tax liability for the year — roughly 30 percent of her expected income — and sets aside that percentage from every payment she receives. That money goes into a separate 'tax savings' account, not her buffer. So when the quarterly bill comes, she's ready. Luna: That's smart. It's like paying yourself a salary, but with the government as a silent partner. Lucas: Exactly. And I think that's the overarching principle: treat your business or freelance income like a small company. The company pays you a steady salary — your base expense floor — and everything else is the company's reserve and profit. Once you separate the business checking from your personal spending, the whole thing gets clearer. Luna: I can see that working for people with side hustles too. Even if your main job is steady, a variable side income can feel like a bonus — but it's better to have a system for it. Lucas: Absolutely. If you have a steady job and a freelance gig, you can use the same buffer method just for the variable portion. Maybe your base expenses are covered by your salary, so the freelance income all goes into a buffer for fun or investment. But the key is having the rule before the money arrives. Luna: So to wrap up, the three steps are: calculate your true base expense floor, build a buffer of at least three months of that floor, and then allocate every surplus dollar in a predetermined order. Lucas: That's it. It's not complicated, but it requires a little upfront work. And it's the single most effective thing I've seen for anyone whose income doesn't arrive on a predictable schedule. Luna: I'm going to try the base-expense floor exercise myself this weekend, even though my income is steady. I bet there's a number in there I haven't looked at honestly. Lucas: Do it. And if you find something surprising, let us know — we'd love to hear. For now, that's the system. Next episode, we're going to look at a totally different angle: how to budget when you're carrying credit card debt and trying to pay it down aggressively. Luna: That's a tough one. Looking forward to it.