Return on investment tells you how efficiently your money is working. Whether you're evaluating a stock, a business decision, a marketing campaign, or a home renovation, ROI gives you a single number to compare against: if it's positive, you gained; if it's negative, you lost. This calculator makes that comparison instant.
Step 1. Enter the gain from your investment — the profit or return, not the total value.
Step 2. Enter the original cost of the investment.
Step 3. The calculator shows ROI as a percentage and your net profit in dollar terms.
With the default inputs loaded in the form, the calculator produces a starting result you can use as a baseline. Change one field at a time to compare a new scenario.
ROI is one of the most universal financial metrics because it works across almost any context. The formula is always the same: (gain minus cost) divided by cost, expressed as a percentage. A $3,000 gain on a $10,000 investment is a 30% ROI. A $500 gain on a $2,000 investment is also a 25% ROI — but it required far less capital.
One limitation of simple ROI is that it doesn't account for time. A 30% ROI over two months is dramatically better than a 30% ROI over ten years. When comparing investments with different time horizons, use annualized ROI (also called CAGR) instead, which puts both returns on an equal per-year basis.
In a business context, ROI is often used to evaluate marketing spend. If you spend $5,000 on advertising and it generates $18,000 in revenue at a 60% profit margin, your marketing gain is $10,800 and your marketing ROI is 116%. This calculation helps businesses decide where to allocate budget across different channels.
It depends entirely on context and time horizon. For stocks, the long-term historical average is roughly 10% annually. For real estate, 8–12% is typical. For a business investment expected to pay back in one year, 20%+ is usually the minimum threshold. For comparison, a savings account might earn 4–5% ROI annually with zero risk.
Use annual net rental income (rent minus all expenses: mortgage, tax, insurance, maintenance, vacancy) as the gain, and your total cash invested (down payment plus closing costs plus any renovation costs) as the cost. This gives you your cash-on-cash ROI.
Standard ROI calculations don't adjust for inflation. To find your real ROI, subtract the inflation rate from your nominal ROI percentage. During a period of 3.5% inflation, a 7% ROI investment is only providing 3.5% real returns.
Enter your monthly income and key expense categories to instantly see your surplus, deficit, and savings rate.
Add up your assets and liabilities to calculate your real net worth — the true measure of your financial position.
Calculate your emergency fund target based on monthly expenses and see exactly how much more you need to save.
See your monthly cash flow by comparing income against fixed expenses, variable expenses, and savings allocations.
Disclaimer: Results from this calculator are for informational and planning purposes only and do not constitute financial, legal, or professional advice. Always verify important calculations with a qualified professional.
