If your income changes dramatically month to month, you already know the challenge. Some months $0 comes in. Other months $70,000 hits your bank account. The question I get most often: how do I actually manage this?
Let's walk through it using a real estate broker as the example, since it's the most extreme case. No sales closed, no money in. Here's the system that works.
1. Set Up Your Three Core Accounts
Before anything else, you need the right structure. Three accounts:
- Business account: where your commissions are deposited and business expenses are paid from. This applies even if you don't have an LLC.
- Tax account: where you're setting money aside to cover your tax bill.
- Personal living account: where your bills actually get paid.
This separation keeps everything clean and removes the temptation to spend money that isn't really yours.
2. Understand Your Spending
Not the most exciting task, but it's the foundation. You need to know two numbers: what your business costs to run each month, and what your personal life costs to run each month.
Keep 2 to 3 months of business expenses in your business account at all times. For personal expenses, I typically recommend keeping 9 to 12 months of living expenses in your personal account as a buffer. If you have other income streams or more consistent cash flow, you might be comfortable at 6 months, and sometimes even lower depending on circumstances. It depends on your situation.
3. Set Up a Percentage-Based System
This is the main event. Every time a commission hits, you immediately split it into buckets based on set percentages. You're not deciding in the moment, you're following a rule you set in advance.
The general buckets look like this:
- Operating/Living (50–60%): Monthly "salary" transfers to personal checking
- Taxes (25–30%): Self-employment + federal/state (set aside immediately)
- Business Expenses (5–10%): Software, marketing, E&O insurance, etc.
- Profit/Savings (10–15%): Investments, retirement, emergency fund
The exact percentages will vary based on your income level, state taxes, and personal situation. Work with your financial advisor or accountant to dial in your specific numbers.
4. Common Questions I Get
"What if my living expense percentage isn't enough to cover my bills?"
This is a sign to audit your spending. You'll likely need to temporarily pull back on saving and investing to cover the gap. The 9 to 12 month buffer in your personal account exists exactly for this reason, keep filling that bucket back up.
"What if my personal account is overfunded?"
Keep saving the same percentage to remove emotion from the decision. Anything above your target buffer is overage, and you should direct it toward a specific goal like investing, a home purchase, or a car.
"What if I can't afford to save for taxes?"
This one isn't optional. You need to know your estimated tax bill, stay current on quarterly estimated payments, and make this a fixed part of your system. Falling behind on taxes creates a problem that compounds quickly.
"My spouse earns enough to cover our bills. Does this still apply?"
Yes, but it gets more nuanced. This is worth a longer conversation with your advisor because the right answer depends on your specific income levels and dynamic, but here are the three most common approaches I walk clients through:
- Pro Rata (% of income): Each contributes to bills proportional to their income share — feels "fair" mathematically
- Fixed Ownership: Spouse owns certain bills, broker owns others — simple, clean, no math needed
- Fully Joint Pool: Both incomes go into one household account, bills paid from there — best for high-trust couples who want simplicity
Pro-rata system: Each person covers a share of the household bills proportional to their share of total income. If you earn 75% of the combined household income, you cover 75% of the bills. Start by calculating what that dollar amount is in an average month, then determine what percentage of your commission income you need to transfer into your personal account to reliably hit that number. This approach feels fair and scales naturally if incomes shift over time.
Fixed bill ownership: You each claim specific bills rather than splitting everything proportionally. You might own the mortgage and utilities, your spouse owns daycare and car payments. Calculate the exact dollar amount of the bills you're responsible for and use that to set your transfer amount. It keeps things simple and predictable, and eliminates the need to reconcile every month.
Joint pool account: You both contribute into a shared account that covers household expenses. I'd still recommend keeping your commission account separate for tracking and tax purposes, then transferring a set percentage of each commission into the joint account. This works well for couples who prefer not to think of finances as "mine vs. yours."
There's no perfect answer here, and it varies from couple to couple. The most important thing is that you have an open, explicit conversation with your spouse about how you're managing it, because variable income affects both of you. Whatever system you choose, the commission account stays separate.
Wrapping It Up
The variable income life gets a lot easier once you have a system in place. You stop making financial decisions based on emotion and start following a structure that works in any month, whether it's your best or your slowest. Get your three accounts set up, know your spending, and commit to your percentages. Future you will be grateful you did.
