Skill Depreciation

The decline in the economic value of a skill over time as tools, industries or demand change.

Example

A premium of 6,000 shrinking 10% a year is worth about 3,543 after five years.

Specific technical skills often depreciate faster than broad skills such as communication and judgement.

Earnings Premium — The additional income associated with a qualification, skill or experience compared with not having it.
Human Capital — The economic value of a person's skills, knowledge, health and experience, reflected in their capacity to earn over a working life.

The real price includes the income you give up and the years the skill stays valuable — A self-investment's full cost is fees plus lost earnings plus time. Its value depends on how large the earnings difference is and how long it lasts before the skill ages. (12 min)
Borrowing for skills that may not pay, and tax relief that depends on where you live — The biggest risks are paying for education that does not change earnings, financing it with debt, and skills losing value. Tax treatment of education costs and support varies by country. (11 min)
The one asset with no counterparty, and the one you cannot diversify easily — Investing in skills, knowledge and health strengthens every other part of a financial life. It works best alongside savings, spread across durable and specific skills, and with health treated as the base it all rests on. (9 min)