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Calcimator

Business Plan Projections Calculator

Generate 3-year financial projections for your business plan.

About this calculator

A business plan projection turns three assumptions — a starting revenue figure, a growth rate, and a cost structure — into a three-year financial narrative a lender or investor can evaluate quickly. This calculator compounds Year 1 revenue by the same growth rate for two more years, applies cost of goods sold as a constant percentage of whatever revenue lands in each year, and grows operating expenses by a separate rate that typically runs slower than revenue growth as fixed costs like rent and core salaries scale less than proportionally with sales. Net income for each year is simply gross profit minus that year's operating expenses, and the model reports Year 3's net margin as a shorthand for how profitable the business becomes once growth compounds.

The honesty of any such projection depends entirely on how realistic the growth rate assumption is: real businesses rarely sustain one constant growth rate for three straight years, cost structures shift as a company scales, and this model has no room for one-time costs like equipment purchases, funding rounds, or seasonal swings in revenue. Use it to sanity-check the arithmetic behind a plan's headline numbers, not as a substitute for a bottoms-up forecast built from actual unit economics, hiring plans, and market research specific to the business.

Inputs

$
%
%
$
%

Summary

Year 1 Net Income

$30,000.00

≈ 15 gaming PCs

Year 2 Net Income$52,500.00
Year 3 Net Income$82,125.00
Year 2 Revenue$250,000.00
Year 3 Revenue$312,500.00
Year 3 Net Margin26.3%
Total 3-Year Revenue$762,500.00
How to Use This Calculator
  1. Enter your Year 1 Revenue and expected Annual Revenue Growth rate.
  2. Enter COGS as % of Revenue and your Year 1 Operating Expenses (rent, salaries, marketing).
  3. Set OpEx Annual Growth — how fast operating expenses are expected to rise each year.
  4. Review Year 1, Year 2, and Year 3 Net Income projections.
  5. Check Year 3 Net Margin and Total 3-Year Revenue to gauge overall profitability trajectory.

How the result changes with Year 1 Revenue

Year 1 RevenueYear 1 Net Income
$100,000.00-$35,000.00
$150,000.00-$2,500.00
$300,000.00$95,000.00
$500,000.00$225,000.00

What each input means

Year 1 Revenue
Projected first-year revenue.
Annual Revenue Growth
Expected annual revenue growth rate.
COGS as % of Revenue
Cost of goods sold as percentage of revenue.
Year 1 Operating Expenses
Year 1 operating expenses (rent, salaries, marketing).
OpEx Annual Growth
Annual growth rate of operating expenses.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Year 1 Revenue = 200000, Annual Revenue Growth = 25, COGS as % of Revenue = 35, Year 1 Operating Expenses = 100000 = 5 input(s) provided
  2. Calculate Year 1 Net Income
    Year 1 Net Income
    30000 = $30,000
  3. Calculate Year 2 Net Income
    Year 2 Net Income
    52500 = $52,500
  4. Calculate Year 3 Net Income
    Year 3 Net Income
    82125 = $82,125

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.

Frequently Asked Questions

Why does compounding one growth rate for three years matter so much to the result?

Because growth applies to an already-larger base each year, a 25% rate doesn't add the same dollar amount in Year 3 as it did in Year 2 — it adds 25% of a bigger number. Small changes to the growth rate assumption therefore swing Year 3 revenue and net income far more than they swing Year 1, which is exactly why lenders scrutinize that single input closely.

What's the practical difference between the revenue growth rate and the OpEx growth rate?

Revenue growth rate scales the top line, while OpEx growth rate scales operating costs like rent, salaries, and marketing separately. Setting OpEx growth lower than revenue growth models operating leverage — costs growing slower than sales — which is the mechanism by which net margin typically improves as a business scales.

Does this projection account for one-time costs like new equipment or a funding round?

No. The model only projects recurring revenue, cost of goods sold, and operating expenses forward at fixed rates — it has no line for capital expenditures, loan proceeds, taxes, or irregular expenses. A real business plan needs those added separately alongside this recurring-operations forecast.

How should I use the Year 3 Net Margin figure when reviewing a plan?

Compare it against typical margins for the industry the business operates in. A Year 3 margin that looks dramatically higher than established competitors usually signals an overly optimistic growth or cost assumption somewhere in the inputs rather than a genuinely superior business model.

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