marketing
ROI (Return on Investment)
Return generated per dollar invested. The universal yardstick for any spend decision.
Definition
ROI is (gain from investment - cost of investment) / cost of investment, expressed as a percentage. A $10K marketing spend that produces $40K in new revenue is a 300% ROI (gross). For service businesses, the more useful version is profit ROI: same spend, same revenue, but $14K gross profit = 40% ROI. Always specify which version. ROI on marketing should be tracked per channel - some channels look great in aggregate but mask losers. Time horizon also matters: an enterprise sale with a $100K LTV might justify a 6-month payback.
Calculating ROI correctly
Basic ROI is (gain minus cost) divided by cost, expressed as percent. A 10K investment producing 40K in additional revenue is 300 percent ROI on a revenue basis. But revenue ROI overstates true returns because the gain ignores the cost of producing the additional revenue. Profit ROI uses gross profit or net profit instead of revenue: 10K spend, 40K revenue, 14K gross profit equals 40 percent profit ROI. Always specify which version. For US small business decisions (marketing, hiring, equipment), profit ROI is the right metric because revenue without margin is theater. Sophisticated investors and CFOs default to profit-based or cash-based ROI calculations.
Time-adjusted ROI and IRR
Simple ROI ignores time. A 50 percent return in one year and a 50 percent return over five years are not equivalent. For multi-year investments (software platforms, major hires, capital equipment), use annualized ROI or internal rate of return (IRR). Annualized ROI for a 50 percent return over 3 years is (1.5 raised to 1/3) minus 1, or about 14.5 percent per year. IRR is more sophisticated and handles uneven cash flows. Excel and Google Sheets both have IRR functions. US small business investment decisions over 12 months should always use time-adjusted metrics; under 12 months simple ROI is fine.
Channel-level ROI tracking
Aggregate marketing ROI hides losers. A business spending 100K total on marketing might post 4x ROI overall (300K profit on 100K spend), but the breakdown could be 8x on Google Search (40K to 320K), 2x on LinkedIn (30K to 60K), and 0x on a podcast sponsorship (30K to break-even). The aggregate looks healthy; LinkedIn and podcast are quietly burning cash. Track ROI per channel monthly. The discipline: every channel must clear a minimum profit ROI of 3x (300 percent gross or roughly 100 percent profit after costs) within 6 to 12 months. Below that threshold, the channel either gets fixed or killed.
ROI hurdle rates for capital decisions
Set a minimum ROI required to greenlight any investment. For US small business, common hurdle rates: marketing campaigns 3x revenue or 100 percent profit ROI, software platforms with multi-year contracts 200 percent profit ROI over the contract life, equipment with 5-year useful life 150 percent ROI, hiring 200 percent revenue ROI per role within 12 months. Below the hurdle, the answer is no even if the absolute return looks attractive. Hurdle rates protect against opportunity cost (the same dollar invested elsewhere would return more) and force discipline when multiple competing investments demand capital.
FAQ
What is a good ROI for a US small business?
Depends on the investment type and risk. Marketing campaigns should clear 3x to 5x revenue ROI (or 100 percent plus profit ROI) to justify the spend. Software and infrastructure investments should clear 150 to 300 percent profit ROI over their useful life. Hiring should produce 2x to 4x revenue per role per year. Real estate and capital equipment with multi-year horizons should clear 8 to 15 percent annualized return. As a rule, if the ROI is below what you would earn passively in a money market account (4 to 5 percent in 2025), the investment is not worth the risk or effort.
Why does ROI on marketing look different from ROAS?
ROAS is revenue divided by ad spend, which counts only the ad spend in the cost. ROI includes all costs: ads, content production, marketing team time, agency fees, software, and the cost of goods sold on the resulting revenue. A campaign with 5x ROAS often has 1.5x to 2x ROI once fully loaded costs are included. ROAS is useful for tactical ad-platform decisions; ROI is the metric for strategic budget allocation. Confusing the two leads to overspending on channels that look great on platform dashboards but lose money once fully costed.
How do I calculate ROI when the return is intangible (brand, training, culture)?
Use proxy metrics. For brand investment: lift in unaided brand recall, share of organic traffic, lower CAC over 12 months. For training: lift in delivery quality metrics, fewer customer complaints, faster ramp time for new hires. For culture investments: employee retention rate, eNPS, time-to-fill on open roles. The ROI calculation uses the proxy metric improvements multiplied by their dollar value (e.g., 10 percent lower turnover at 50K cost per replacement times 5 employees equals 25K of value). Imperfect but better than treating intangible investments as un-measurable.
Should I include opportunity cost in ROI?
For strategic decisions, yes. If you invest 100K in a new service line, the opportunity cost is what that 100K could have earned in your highest-ROI alternative (paying down debt, scaling an existing channel, hiring more reps in your best segment). True ROI is the return on the new investment minus the return you forgo on the alternative. For tactical decisions inside a fixed budget, the alternatives are already constrained, so opportunity cost matters less. Founders who consistently ignore opportunity cost end up with too many medium-ROI investments and not enough high-ROI ones.
How long should I wait before judging ROI?
Depends on the investment. Performance marketing channels (Google Search, Meta Ads): 60 to 90 days for initial signal, 6 months for confident judgment. Content and SEO: 9 to 18 months because organic compounds slowly. Major hires: 6 to 12 months for ramp and productive contribution. Capital equipment and software platforms: 12 to 24 months for full deployment. Kill investments early only if they are clearly broken (negative trajectory after 50 percent of expected timeline); otherwise wait for the full evaluation window before judging.
In your business
- →Track ROI per channel, not aggregate
- →Use profit ROI, not revenue ROI
- →Set a minimum ROI hurdle (e.g., 3:1) before scaling any spend