The 70/20/10 Rule for Solopreneur Cashflow

Most personal finance advice was written for people with a steady paycheck. Solopreneurs don't have one. Some months you make $12,000; some months you make $1,800. The standard "50/30/20" rule quietly falls apart the moment your income is lumpy.

The 70/20/10 rule is what I use instead. It's a simple, three-bucket split that works whether you had a great month or a scary one, and it keeps you from doing the two things that reliably destroy solo businesses: overpaying yourself in good months, and starving the business in bad ones.

Here's the full framework, a worked example with a real $5,000/month solopreneur, and the failure modes that catch almost everyone at least once.

The rule, in one sentence

For every dollar of profit your business makes:

• 70% goes to you — the owner. Salary, personal savings, personal taxes.
• 20% goes back into the business — tools, marketing, contractors, growth experiments.
• 10% goes into a reserve — an untouchable buffer that pays you when the business can't.

That's it. Everything below is explaining why those specific numbers work, and how to actually implement the split without a finance degree.

Why "profit," not "revenue"

The rule is applied to profit, not top-line revenue. This is the single most important detail, and it's the one people miss.

Profit here means: what's left after you've paid your actual business costs (software, contractors, ad spend, transaction fees) and set aside money for taxes.

Concrete example: your business brings in $10,000 in a month. Software and contractors cost $2,000. You set aside 30% of the remaining $8,000 for taxes, which is $2,400. That leaves $5,600 of real profit. The 70/20/10 split runs on that number — not the $10,000.

Skipping this step is how solopreneurs end up owing $18,000 to the tax authorities in April. Set aside taxes first, always, in a separate account. Then split what's left.

The three buckets, explained properly

70% — Owner

This is your paycheck. It covers your rent, groceries, personal savings, and personal retirement contributions. In a good month it's larger; in a bad month it's smaller.

That variability is the whole point. Trying to pay yourself a flat "salary" in a business with lumpy revenue means you either underpay yourself in good months (and slowly build resentment) or overpay in bad months (and drain the business). Percentage-based owner pay adjusts automatically.

The one guardrail: know your minimum viable owner pay. How much do you need every month to cover your fixed personal costs — rent, food, health insurance, insurance, minimum debt payments? Call it your floor. In months when 70% of profit is below your floor, the reserve bucket (below) tops you up. In months when it's well above your floor, the excess is personal savings, not "extra spending money."

20% — Business reinvestment

This is what compounds a solo business over the long run, and it's the bucket every solopreneur is tempted to raid.

Concrete things it pays for:

• New tools that give you back hours (see the AI tools worth their fee)
• A designer, editor, or virtual assistant for the tasks that aren't your zone of genius
• Paid experiments — a small ad test, sponsoring a niche newsletter, running a paid workshop
• Courses or coaching for a specific skill gap
• Higher-quality asset production (photography, illustration, video)

A business that reinvests 20% of profit consistently, for two years, is a fundamentally different business than one that reinvests 0%. It's the difference between "self-employed with the same skills as last year" and "small business that has grown its capabilities."

10% — Reserve

This is the bucket that saves your business — and your sanity — the first time a month goes badly. It's an untouchable savings account that only exists to smooth income variance and handle emergencies.

The goal is to build it up to three to six months of your minimum viable owner pay, then stop growing it and let the extra flow to the other buckets. Once it's full, you have a real cushion. Bad month? The reserve tops you up to your floor. Two bad months in a row? Still fine. Client ghosts you for 60 days on an invoice? Still fine.

Without a reserve, every bad month becomes a crisis, and every crisis pushes you into short-term decisions — taking clients you shouldn't, discounting products you shouldn't, adding side work that dilutes your focus. The reserve is what buys you the ability to say no.

A worked example: $5,000/month solopreneur

Let's put real numbers on it. Assume you're a solo consultant / creator averaging $5,000/month in revenue, with reasonable US-adjacent tax rates.

Revenue: $5,000

Business expenses: $600 (software, one contractor, transaction fees)

Pre-tax profit: $4,400

Tax reserve (28%): $1,232 → separate tax account

Distributable profit: $3,168

Applying 70/20/10:

• Owner (70%): $2,218/month
• Reinvestment (20%): $634/month
• Reserve (10%): $317/month

Over a full year at that pace: $26,600 in personal income, $7,600 reinvested into the business, $3,800 into reserves. Plus $14,800 sitting in the tax account for your quarterly payments.

In a great month at $10,000 revenue, everything scales up. In a $2,500 month, the owner bucket might drop to $1,100 — below your personal floor — and the reserve tops you up to your floor. In a $0 month (they happen), the reserve carries you entirely, and you don't have to touch your personal savings or take on debt.

That flexibility is the point of the system.

Setting it up in real life

You don't need special software. You need three or four bank accounts and a monthly ritual.

1. A separate business checking account. Non-negotiable. All revenue goes here; all business expenses come from here. Never commingle with personal.
2. A tax savings sub-account. The moment revenue lands, sweep 25–30% into it. Pay quarterly taxes from this account.
3. A reserve sub-account. The 10% goes here, and stays here, until it's fully funded.
4. A personal checking account. The 70% owner pay transfers here monthly — like a paycheck.
5. A "reinvestment" sub-account, optional. The 20% either stays in the business checking, or you can move it to a sub-account so you don't accidentally treat it as owner pay.

Do the split once a month, not every time money hits your account. Pick a day — the 1st or the 15th — and run the whole reconciliation. This ritual is what actually makes the system stick.

Common failure modes (and how to avoid them)

Failure 1: Skipping the tax bucket. By far the most common. You skip taxes for a quarter, use the money for something else, and now you're chasing $6,000 you don't have. Fix: sweep taxes first, automatically, before any other calculation.

Failure 2: Treating a great month as your new normal. You have a $15,000 month, you pay yourself accordingly, and then the next three months average $4,000 and you're in trouble. Fix: your personal spending floor is based on your 12-month rolling average, not this month.

Failure 3: Raiding the reinvestment bucket for personal spending. "Just this once." Then again. Then the business quietly stops growing. Fix: literally move the 20% to a separate account so it's not sitting next to your grocery money.

Failure 4: Never actually spending the 20%. The opposite failure. You accumulate a "reinvestment" pile, never deploy it, and end up over-hoarding instead of growing. Fix: quarterly review — what did you spend the 20% on, and did it move the business forward? Deploy it deliberately.

Failure 5: Adjusting the percentages every month. The whole point of a rule is that you don't renegotiate it. Set the split. Follow it. Review it once a year, not once a month.

When to adjust the ratios

70/20/10 is a starting point, not scripture. A few situations where the split should shift:

• First year of a business with growth potential: consider 50/40/10 to reinvest more aggressively.
• Established business with a comfortable reserve: shift to 80/15/5 once your reserve is fully funded.
• Business you're winding down: 90/0/10 makes sense; there's no point reinvesting in something you're closing.
• Rapidly scaling business with clear paid-acquisition ROI: consider 40/50/10 for a defined period.

The specific numbers matter less than the discipline. What matters is that every profitable month, some of the money leaves the business account on autopilot and goes to a defined destination.

Key takeaways

• Split profit — not revenue — into 70% owner pay, 20% reinvestment, 10% reserve. Set aside taxes first.
• Percentage-based owner pay handles lumpy income automatically without draining the business.
• The 20% is what compounds a solo business over years. Protect it, and actually deploy it.
• The 10% reserve buys you the ability to say no — the most valuable financial asset a solopreneur has.
• Automate the split with sub-accounts. Do the reconciliation once a month, not once a day.

Get the split right, and your business quietly becomes the kind that survives bad quarters and compounds through good ones. Which, over five or ten years, is the whole game.