Revenue Forecast Calculator
Project future monthly and cumulative revenue based on your current growth rate.
Results
Visualization
How It Works
A revenue forecast projects how much your store will earn over a future period by applying a consistent growth rate to your current revenue. It helps you set realistic targets, plan cash needs, and model the impact of growth initiatives. Compound growth means small monthly growth rates add up significantly over a year or more.
The Formula
Variables
- R₀ — Current monthly revenue — your starting baseline
- g — Monthly growth rate as a decimal (e.g., 5% = 0.05)
- N — Number of months into the forecast
- Rₙ — Projected revenue in month N = R₀ × (1 + g)^N
Worked Example
A store currently doing $10,000/month with a 5% monthly growth rate will reach $17,959 in month 12 — a 79.6% increase. Over the full 12 months, total cumulative revenue would be approximately $160,000. A 10% monthly growth rate would push month-12 revenue to $31,384 and cumulative to $213,000 — illustrating the power of compounding.
Practical Tips
- A 5–10% monthly growth rate is strong for ecommerce — be conservative in financial planning and use your actual trailing 3-month average.
- Separate organic growth from paid growth — if you cut ad spend, organic-only growth may be much lower than your current blended rate.
- Model multiple scenarios (bear/base/bull) with different growth rates to understand your range of outcomes.
- Factor in seasonality — Q4 (Oct–Dec) typically sees 30–50% higher revenue for most ecommerce categories.
- Use the cumulative revenue figure to plan inventory purchases, hiring, and ad budget well in advance.
Frequently Asked Questions
What monthly growth rate should I use?
Use your actual average monthly growth rate from the past 3–6 months. To calculate it: (Current Month Revenue / Revenue 3 Months Ago)^(1/3) - 1. For planning, run both a conservative scenario (half your recent rate) and an optimistic scenario (your best recent rate) to bound your expectations.
How accurate are revenue forecasts?
Forecasts become less accurate the further out you project. A 3-month forecast is fairly reliable if your business is stable; a 12-month forecast is best used as a directional planning tool rather than a precise prediction. Market changes, seasonality, and competition can all alter actual results significantly.
What does the seasonal adjustment do?
The seasonal adjustment applies a one-time boost to the final month of the forecast period to account for peak season performance. For example, if your store sees a 40% boost in December, set seasonal adjustment to 40% and forecast 12 months to see the December-adjusted number.
How do I use this for budgeting?
Use the cumulative revenue figure to estimate annual top-line revenue, then apply your gross margin to get gross profit. From gross profit, subtract operating expenses to estimate net income. Running this forecast at the start of each quarter helps you adjust budgets in real time.
What's a realistic annual growth rate for ecommerce?
The ecommerce industry average annual growth rate is roughly 10–15%. High-growth startups can achieve 50–100%+ annually in early years. A consistent 5% monthly growth rate compounds to approximately 80% annual growth — which is exceptional and unlikely to be sustained long-term.