Merchant Discount Rate (MDR)

A fee paid by the acquiring bank to the issuing bank each time a payment card transaction is processed, representing the largest component of the merchant discount rate. Interchange fees are set by card networks (Visa, Mastercard) and vary by card type, merchant category, transaction method (card-present vs card-not-present), and jurisdiction.

The rate at which a company's existing customers cease doing business with it over a given period, typically expressed as an annual percentage. Customer attrition rate is a critical input to the valuation of customer relationship intangible assets under both the multi-period excess earnings method and the distributor method.

The rate used to convert a single-period earnings or cash flow figure into an indication of value, calculated as the discount rate minus the expected long-term sustainable growth rate. The capitalisation rate is the reciprocal of the capitalisation multiple and is used in the capitalisation of earnings method for businesses with stable, predictable income streams.

A discount rate that incorporates a premium reflecting the specific risks associated with a particular asset, cash flow stream, or investment. In intangible asset valuations, risk-adjusted discount rates are typically higher than the weighted average cost of capital to reflect the greater uncertainty inherent in intangible asset cash flows compared to tangible assets.

The theoretical rate of return on an investment with zero default risk, used as the foundation for building discount rates in valuation. In practice, the yield on government bonds of a maturity matching the expected cash flow duration serves as a proxy — typically US Treasury bonds for USD-denominated valuations or UK gilts for GBP-denominated analyses.

The rate used to convert future expected cash flows into their present value, reflecting the time value of money and the risk associated with those cash flows. Selecting the appropriate discount rate is one of the most critical and sensitive decisions in intangible asset valuation, as small changes can materially alter the estimated fair value.

The rate at which a company spends cash in excess of its income, typically expressed as a monthly figure. Burn rate is a critical metric for startups and growth-stage companies, directly determining how long the business can operate before requiring additional capital (runway).

A reduction to business value reflecting the risk that the departure of one or more critical individuals would materially impair the company's earnings, relationships, or operational capability. Key person discounts are most significant in professional services, early-stage ventures, and founder-led businesses where revenue concentration or specialised expertise is tied to specific individuals.