Capital Stack and Blended Cost Calculator
Combine senior debt, mezzanine financing, and preferred equity to calculate a weighted blended cost and visualize each layer of the capital stack.
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How the Blended Capital Cost Is Calculated
Each capital component is weighted by its share of the total stack. The calculator multiplies the senior debt, mezzanine financing, and preferred equity amounts by their respective annual rates, then divides the combined annual cost by the total capital provided.
Annual Component Cost = Capital Amount × Annual Cost Rate
Blended Cost = Total Annual Capital Cost / Total Capital Stack
Share of Stack = Component Amount / Total Capital Stack
Understanding Capital Stack Priority
Senior debt generally has the first repayment priority and the lowest cost. Mezzanine financing sits behind senior debt and usually carries a higher rate or additional participation. Preferred equity is subordinate to debt but senior to common equity distributions, so its required return is typically higher than senior financing.
What the Simple Annual Cost Does Not Capture
A stated annual rate does not always represent the full effective cost. Origination fees, exit fees, accrued or payment in kind interest, profit participation, minimum return multiples, preferred return compounding, and extension fees can materially change the economics. Use the calculator as an initial comparison and review the complete term sheets before selecting a structure.
Capital Stack Worked Example
For a $10 million project, assume $6 million of senior debt at 7 percent, $1.5 million of mezzanine financing at 12 percent, and $1 million of preferred equity at 15 percent. The three layers provide $8.5 million and cost $750,000 per year, producing an 8.82 percent simple blended annual cost and leaving a $1.5 million common equity funding gap.
Choosing Capital Cost Inputs and Reading the Result
Enter the contractual annual cost for each layer only when it is a reasonable proxy for that capital's economics. Convert payment in kind interest, preferred returns, fees, and participation into comparable annual costs when possible, then stress test them separately. A lower blended percentage does not by itself make a stack safer because maturity dates, intercreditor rights, cash pay requirements, and repayment priority can control the outcome.
Frequently Asked Questions
How is blended cost of capital calculated?
Multiply each capital amount by its annual cost, add those annual costs, and divide by the total capital provided. Weighting prevents a small expensive layer from being treated the same as a large lower cost layer.
Does the blended cost include common equity?
No. This calculator blends senior debt, mezzanine financing, and preferred equity. Any remaining funding gap represents common equity or another source whose required return is not included.
Should fees and profit participation be included?
Yes when comparing full economics, but this calculator accepts a simple annual rate for each layer. Convert fees, compounding, exit charges, and participation into an estimated annual cost or model them separately before choosing a structure.