The yield on cost formula measures annual dividend payouts as a percentage of an investment's initial purchase price. It is calculated by dividing the current annual dividend per share by the original purchase price per share, then multiplying by 100. This personal historical metric tracks payout growth on starting capital over time.
Yield on cost (YOC) measures annual dividend income relative to a stock's initial purchase price. It shows how much cash an investment generates based on starting capital.
When you buy a dividend stock, initial payouts are only a starting point. Over time, growing cash distributions increase returns on original outlay. However, tracking this metric requires knowing what it shows—and what it misses. This guide covers the yield on cost formula, step-by-step calculations, and psychological traps to avoid.
Quick Takeaways
01Yield on cost measures current annual dividend income as a percentage of original purchase cost.
02Unlike current yield, yield on cost is a personal, historical metric that reflects past dividend growth rather than present value.
03Reinvesting payouts or dollar-cost averaging alters your cost basis, changing the formula denominator over time.
04A high yield on cost does not protect against dividend cuts, making it unsuitable for asset allocation decisions.
What Is Yield on Cost?
Yield on cost evaluates annual income relative to the cash spent buying a stock. When companies increase their dividends, cash generated by starting capital rises.
For long-term investors, yield on cost serves as a progress marker. If a company raises payouts over a decade, your cash return on original outlay grows. However, yield on cost is purely an internal historical metric. It shows past payout expansion rather than current market value.
The Yield on Cost Formula and Calculation
Calculating yield on cost requires two figures: current annual dividend per share and initial purchase price per share.
Yield on Cost = (Current Annual Dividend per Share / Initial Purchase Price per Share) × 100
The numerator is the expected dividend payout per share over the next 12 months. The denominator is your original purchase price per share, including transaction fees.
To calculate yield on cost:
Find your original purchase price per share from account records.
Identify the current annual dividend per share.
Divide annual dividend per share by original purchase price per share.
Multiply by 100 to get a percentage.
For example, buying shares at $50 paying $2 annually equals a 4.0% initial yield. If the annual dividend rises to $4 while your purchase price stays $50:
Yield on Cost = ($4.00 / $50.00) × 100 = 8.0%
Corporate payout increases doubled your personal yield on original cost.
Yield on Cost vs. Current Dividend Yield
Yield on cost differs from current dividend yield in its calculation denominator.
Metric
Formula Denominator
Purpose
Decision Role
Yield on Cost
Initial Purchase Price
Measures yield growth on original outlay
Personal tracking metric
Current Dividend Yield
Current Market Price
Measures cash yield relative to present price
Valuation and asset allocation
Current yield uses present share price. If that stock now trades at $100 paying $4 annually, current yield is 4.0% ($4 / $100).
Yield on cost shows what original capital earns today, while current yield shows what new capital earns if invested today.
Current yield provides the relevant benchmark for deciding whether to hold or reallocate shares.
Real-World Adjustments: Dividend Reinvestment Plans (DRIP) and Dollar-Cost Averaging
Simple calculations assume one purchase. In practice, buying shares over time or using Dividend Reinvestment Plans (DRIP) changes your cost basis.
Reinvesting payouts or making periodic buys increases invested capital and share count. To calculate yield on cost accurately, use your average cost basis per share (net cash invested divided by total shares held).
Ignoring reinvested payouts understates true invested capital, artificially inflating yield on cost. To evaluate whether growing payouts remain sustainable, investors monitor the company's payout ratio.
The Anchoring Trap: Limitations of Yield on Cost
While yield on cost shows income growth, relying on it for decisions introduces behavioral traps.
The main risk is price anchoring. Investors often develop an emotional attachment to a stock because personal yield on cost appears high—for example, 12%. They may refuse to reallocate capital from a declining business simply to preserve that high historical percentage.
However, yield on cost is a backward-looking figure. It does not reduce market risk. If a business deteriorates, high personal yield on cost will not prevent a dividend cut or capital loss. If $10,000 worth of shares paying 3% today could be redeployed into a lower-risk asset paying 5%, holding the declining stock for high yield on cost causes opportunity loss.
Conclusion
The yield on cost formula measures dividend income growth relative to original capital. It highlights the compounding power of long-term dividend growth. However, because yield on cost relies on past entry prices, it remains a personal milestone rather than a forward-looking valuation tool.
When evaluating income strategies, our ETF reviews offer a practical next step. All investments carry risk of loss and past payouts do not promise future dividend stability, so evaluate fundamentals carefully before committing capital.
FAQ
5 questions
How do you calculate yield on cost?
To calculate yield on cost, divide the current annual dividend per share by the original purchase price per share, then multiply the result by 100. For example, a $4 annual dividend on a share bought for $50 equals an 8% yield on cost.
What is the difference between yield on cost and current yield?
Yield on cost measures annual dividend payouts relative to your original purchase price per share. Current dividend yield measures annual payouts relative to the stock's current market price. Yield on cost tracks historical performance, while current yield guides current market allocation decisions.
How do reinvested dividends (DRIP) affect yield on cost?
Dividend reinvestment plans (DRIP) and periodic buys add new capital and shares over time, altering your cost basis. To calculate true yield on cost after reinvestment, divide total expected annual dividends by total net cash invested rather than relying on a single initial share price.
Why can yield on cost be misleading?
Yield on cost relies on past purchase prices and does not reflect current portfolio value. Anchoring on a high personal yield on cost can tempt investors to hold a deteriorating stock, ignoring risks of dividend cuts or capital losses.
Is a high yield on cost a reason to hold a stock?
No. Yield on cost is a personal progress metric, not a tool for evaluating future risk or return. Current yield and business fundamentals provide the proper basis for deciding whether to hold or reallocate shares.
Disclaimer
This guide was written with AI assistance and reviewed by the StockEmber editorial team for accuracy. StockEmber provides independent education, not personal financial advice. Some links may support our work at no additional cost to you.
The StockEmber Team is our in-house desk of independent research writers. We test brokerage platforms, read the fine print on fees and custody, and cover ETFs and long-horizon investing for people who plan to hold for decades — not days.
