Business Acquisition IRR Calculator
Model the internal rate of return on a business acquisition. Input purchase price, financing structure, growth rate, and exit multiple to calculate your annualized return on equity.
Cash Flow by Year
Investment vs. returnsMethodology: IRR calculated via XIRR (Newton-Raphson). Cash flows include annual EBITDA less debt service, with exit proceeds net of loan payoff and capital gains tax.
How to Use This IRR Calculator
- Enter deal structure. Input the purchase price, your equity contribution (down payment), and any debt financing. The calculator models how leverage affects your equity returns.
- Set growth assumptions. Enter the business's current annual cash flow and your expected growth rate. Conservative models use 0-5% growth; aggressive models may assume 10-20%.
- Define your exit scenario. Set the expected hold period (typically 3-7 years) and exit multiple. The exit multiple determines the sale price when you sell the business.
- Review your returns. The calculator shows your annualized IRR, total return multiple (MOIC), and how leverage amplifies equity returns compared to an all-cash deal.
How Acquisition IRR Is Calculated
IRR (Internal Rate of Return) is the discount rate that makes the net present value of all cash flows equal to zero. For a business acquisition, the cash flows include your initial equity investment (negative), annual cash distributions during the hold period (positive), debt service payments (negative), and exit proceeds (positive).
The formula solves for the rate r in: 0 = -Equity + CF1/(1+r) + CF2/(1+r)2 + ... + (CFn + Exit)/(1+r)n, where CF represents net cash flow to equity in each year and Exit is the sale proceeds net of debt payoff.
Worked example: You buy a business for $1,000,000 with $200,000 equity and $800,000 in SBA debt at 10%. The business generates $250,000 in annual cash flow growing at 5%. Annual debt service is approximately $127,000, leaving $123,000 in year 1 cash flow to equity. After 5 years, cash flow has grown to ~$304,000 and you sell at 4x for ~$1,216,000, paying off the remaining ~$520,000 in debt. Your equity IRR: approximately 42%.
How Leverage Affects Acquisition IRR
Leverage is the most powerful driver of equity IRR in business acquisitions. When the business earns a return above the cost of debt, the spread accrues entirely to equity holders. This is why SBA-financed deals (80-90% leverage) often produce IRRs of 30-50% even on businesses growing at modest rates.
| Scenario | Equity | Debt | 5-Year IRR |
|---|---|---|---|
| All cash | $1,000,000 | $0 | ~15% |
| 50% leverage | $500,000 | $500,000 | ~25% |
| SBA (80% leverage) | $200,000 | $800,000 | ~42% |
| SBA + seller note (90%) | $100,000 | $900,000 | ~55% |
These examples assume a $1M purchase at 4x earnings, 5% annual growth, and exit at 4x. The same business produces dramatically different equity returns depending on how it's financed. However, leverage also amplifies downside risk. If cash flow drops below debt service, the levered buyer faces losses while the all-cash buyer simply earns a lower return.
Understanding Your Results
IRR (Internal Rate of Return) is your annualized return on equity, accounting for the timing and magnitude of all cash flows. An IRR of 30% means your equity is compounding at 30% per year over the hold period. This is the primary metric for comparing acquisition opportunities.
MOIC (Multiple on Invested Capital) measures total return as a multiple of your initial equity. A 3.0x MOIC means you received $3 for every $1 invested, including cash distributions and exit proceeds. MOIC doesn't account for time — a 3.0x over 3 years is far better than 3.0x over 10 years.
Cash-on-cash return measures annual cash distributions as a percentage of your initial equity. A 25% cash-on-cash return on $200,000 in equity means you receive $50,000 per year in distributions. This metric helps evaluate the income component of your total return.
Levered vs. unlevered IRR. Unlevered IRR shows the return to the total enterprise (ignoring financing). Levered IRR shows the return to your equity only. The spread between the two reveals how much value leverage is creating. A large spread means the deal benefits significantly from financing.
Business Acquisition IRR FAQ
What is a good IRR for buying a business? +
A good IRR depends on deal structure and risk. Most acquisition entrepreneurs target a minimum 25-30% IRR on leveraged deals. Strategic buyers with lower risk tolerance may accept 15-20%. Private equity firms typically target 20-30% net IRR. SBA-financed deals with moderate growth can often achieve 30-50%+ IRR on equity because of the leverage amplification effect.
How does leverage affect acquisition IRR? +
Leverage amplifies equity returns by reducing the capital you invest upfront. When a business earns returns above the cost of debt, the excess accrues entirely to equity holders. The same deal might yield 15% IRR all-cash but 42% IRR with 80% SBA financing. The tradeoff: leverage also amplifies downside risk, and debt service payments reduce your annual cash flow during the hold period.
What is the difference between IRR and cash-on-cash return? +
IRR is the annualized return accounting for all cash flows — investment, distributions, and exit proceeds. Cash-on-cash return measures only the annual distributions relative to your equity. A deal might show 20% cash-on-cash (strong annual income) but 35% IRR when you include the exit. IRR is the more comprehensive metric because it captures total value creation over the hold period.
How does exit multiple impact IRR? +
The exit multiple is often the single largest driver of acquisition IRR. Buying at 3.5x and selling at 4.5x creates significant value through multiple expansion alone, independent of cash flow growth. Conversely, if multiples compress (selling at a lower multiple than you paid), even strong growth may not produce acceptable returns. Conservative buyers model flat or declining exit multiples to stress-test their deals.
What hold period should I model for a business acquisition? +
Most individual acquirers hold for 3-7 years. Private equity targets 3-5 years. SBA-financed deals have a natural 10-year cadence aligned with the loan term. Shorter holds require higher growth or multiple expansion for target IRRs. Longer holds let compounding work but may face operator fatigue. Model multiple hold periods to understand how timing affects your returns.
How does seller financing affect IRR? +
Seller financing reduces your upfront equity requirement, increasing IRR on equity. It also typically carries a lower interest rate than bank debt (5-7% vs. 10%+), reducing total cost of capital. To model it correctly, include the seller note payments as a cash outflow during the hold period and any balloon payment at maturity. Standby seller notes (common in SBA deals) boost IRR even further since payments are deferred.