Inference Cost

Definition

The computational expense of running a trained AI model to generate predictions or outputs in production. Inference costs directly impact the unit economics of AI-powered products and services, and are a key consideration in pricing, margin analysis, and the financial viability of AI deployments at scale.

Complementary Terms

Concepts that frequently appear alongside Inference Cost in practice.

Sunk Cost

An expenditure that has already been incurred and cannot be recovered, regardless of future decisions. While sunk costs should not influence forward-looking investment decisions, the accumulated effect of past intangible investments — in R&D, brand building, and organisational development — creates the stock of intangible capital that drives future value.

Cost of Reproduction

The estimated cost to create an exact replica of an intangible asset as of the valuation date, using the same materials, standards, design, and technology that were originally employed. Cost of reproduction is one of two cost approach premises (alongside cost of replacement) and produces a higher value estimate because it includes costs associated with features that may no longer be necessary or efficient.

Cost Approach (Valuation)

A valuation methodology that estimates the value of an asset based on the cost to reproduce or replace it, adjusted for obsolescence. The cost approach is frequently used to value internally developed intangible assets such as proprietary software and databases where market comparables are unavailable.

Cost of Capital (WACC)

The weighted average cost of capital, representing the blended rate of return a company must earn on its assets to satisfy both debt holders and equity investors. WACC is used as the discount rate in DCF valuations and as a hurdle rate for investment decisions.

Customer Acquisition Cost (CAC)

The total cost of acquiring a new customer, including marketing, sales, and onboarding expenses. Optimising the ratio of customer lifetime value to CAC (LTV:CAC) is a central challenge for growth businesses and a key metric scrutinised by investors.

Opportunity Cost of Capital

The return that could have been earned by investing in the next best alternative of comparable risk. Opportunity cost of capital is the foundation for discount rates used in intangible asset valuations and investment decisions, ensuring that capital is allocated to its most productive use.

Replacement Cost Method

A cost-based valuation approach that estimates the value of an intangible asset by calculating the current cost of creating or acquiring a substitute asset with equivalent utility. The replacement cost method is frequently used for valuing assembled workforces, proprietary software, and databases, adjusted for any functional or economic obsolescence.

Weighted Average Cost of Capital (WACC) Premium

An adjustment applied to the standard WACC to reflect the additional risk associated with specific intangible assets or early-stage businesses. Intangible-heavy investments typically warrant a higher discount rate than the firm-level WACC because their cash flows are less certain and more sensitive to competitive and technological disruption.

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