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Estimating Growth🔵 Intermediate

How Fast Can a Business Realistically Grow Without Taking on More Debt?

What Growth Rate Can This Business Sustain?

Fundamental growth links return on equity (ROE) to the fraction of profits retained. No model or analyst forecasts — just pure financial mechanics.

Fundamental GrowthROERetention RatioSustainable Growth

Live Result

$0.108

ƒ: ROE * retention_ratioraw: 0.108000

ƒ(x)

Use variable names from the panel above (e.g. FV, r, n) — or type numbers directly: 10000 / (1 + 0.08)^10

ROE% as decimal

Return on Equity — net income / book equity

ROE = 0.18

retention_ratio% as decimal

Fraction of earnings retained (1 − payout ratio)

retention_ratio = 0.60

payout_ratio$

Fraction of earnings paid as dividends

payout_ratio = 0.40

💡 You can also enter values directly in the formula: 10000 / (1 + 0.08)^10

⬇ Export Calculation

Exports a plain .txt file with your expression, formula, all variable values, result, and educational notes — ready to paste into any report, Word doc, Notion, or Google Docs.

The exported file includes the formula in standard mathematical notation — you can paste it directly into Excel, Google Sheets, or back into FinanceSheep.

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Learn: What Growth Rate Can This Business Sustain?

Estimating Growth · Educational Guide

The Core Idea

How fast can a company grow without issuing new shares or taking on unsustainable debt? The answer depends on only two things: how profitable is the equity (ROE), and how much of the profit is kept vs paid out?

How It Works

Fundamental growth = ROE × retention ratio. If ROE is 18% and the company retains 60% of earnings, sustainable growth = 18% × 60% = 10.8%. This is the growth you can expect purely from reinvesting profits, without any external funding.

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Real-World Example: Apple: ROE ~145% (2023), but pays dividends and buys back stock heavily. Retention ratio ~50%. Fundamental growth = 145% × 50% = 72.5%. But this is distorted by huge buybacks. A more typical company: ROE = 15%, retention = 70% → growth = 10.5%.

How Fast Can a Business Realistically Grow Without Taking on More Debt?

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