Buying a business vs starting one: which reaches income faster?
Short answer
Buying an established business produces owner income immediately but requires 2–4× seller discretionary earnings in capital. Starting one costs a fraction of that but typically takes 18–30 months to reach the same income, so the choice is capital versus time.
Option A
Buy an existing business
Acquire a going concern with existing customers, staff, and cash flow, usually via SBA-backed debt.
Strengths
- Cash flow from day one, often covering the loan payment and a salary
- Proven demand, existing systems, and trained staff
- Bank financing is available because there is historical cash flow to underwrite
- Seller training period shortens the learning curve
Trade-offs
- 10–15% down payment plus closing and working capital
- Personal guarantee on SBA debt puts your house at risk
- You inherit the culture, the deferred maintenance, and the customer concentration
- Diligence is a real skill and mistakes are expensive
Option B
Start from zero
Build the business yourself, funding early losses out of savings or revenue.
Strengths
- Startup cost can be a few thousand dollars in a service business
- No debt, no personal guarantee, no earnout
- Total control over positioning, pricing, and customer mix
- Failure is cheap and recoverable
Trade-offs
- 18–30 months of below-market income is typical
- You must create demand, not just serve it
- No collateral means no bank will lend to you
- Majority of the work in year one is unpaid infrastructure
Head-to-head
| Metric | Buy an existing business | Start from zero |
|---|---|---|
| Capital requiredB | $120k–$260k down on a $1M deal | $3k–$40k |
| Months to owner incomeA | 1 | 18–30 |
| Debt serviceB | $8k–$12k/mo on $900k SBA | $0 |
| Personal guaranteeB | Required on SBA | None |
| Failure rate over 5 yearsA | Lower — cash flow already exists | Higher |
| Upside multiple on exitB | Bounded by purchase multiple | Unbounded |
| Skills testedEven | Diligence, management | Sales, product |
Badge marks which option wins that row: A = Buy an existing business, B = Start from zero.
Acquisition wins whenever your capital is worth less to you than three years of income.
Put a number on the delay. If a startup path costs you 24 months at $40,000 below your target income, that is $80,000 of foregone earnings — real money that never appears on a spreadsheet. A $1,000,000 acquisition with $150,000 down and a $200,000 SDE pays roughly $80,000 after debt service in year one. The acquisition therefore recovers its own down payment inside two years relative to the startup path, provided the business survives the transition. The variable that decides it is not the price; it is whether the earnings survive the owner leaving.
Worked example: $1,000,000 purchase at 3.3× SDE versus a bootstrapped equivalent
- Seller discretionary earnings = $300,000; price at 3.3× = $1,000,000
- SBA 7(a): 10% down = $100,000, plus $30,000 closing and working capital
- $900,000 over 10 years at 11% = about $124,000/year of debt service
- Owner cash flow = $300,000 − $124,000 = $176,000 in year one
- Startup path: year one owner income about $25,000, year two about $95,000
- Two-year total: acquisition about $352,000, startup about $120,000
A $130,000 outlay buys roughly $230,000 of additional two-year income — but only if the cash flow holds through the ownership change, which is exactly what diligence is for.
The verdict
Choose Buy an existing business
Buy if you have the down payment, can manage people, and want income now more than optionality.
Choose Start from zero
Start if capital is the binding constraint, you can sell, and you can survive two lean years.
Or run both
A hybrid that works: start a service business, use its cash flow and credibility to acquire a competitor in year three.
Frequently asked questions
What multiple is normal for a small business?
Most sub-$5M businesses trade at 2.5–4× SDE. Recurring revenue, low customer concentration, and a manager already in place push toward the top of that range.
How much working capital should I add to the purchase price?
Plan for 8–12% of the purchase price on top of the down payment. Acquisitions rarely fail on price; they fail because the buyer had no cash for the first bad month.
Is seller financing common?
Yes. A 10% seller note is standard on SBA deals and is often required by the lender, which also keeps the seller invested in a clean handover.
Methodology
Uses current SBA 7(a) terms, typical small-business SDE multiples, and observed bootstrapped service-business ramp curves. Excludes taxes, which favour the startup path slightly in the early years.
Run your own numbers
- Business Acquisition Valuation Calculator
- SBA Loan Payment Calculator
- Business Break-Even Calculator
- Start vs buy a business
- All revenue answers
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Last updated 2026-08-13. Machine-readable version: /api/public/comparisons.json. Free to cite with attribution to RevenueLab.