Why High-Maintenance Beauty Is a Low-Yield Asset

The Law of Diminishing Returns in Your Bathroom

We all have that one friend who spends £200 a month on skincare. Twelve steps, morning and night, like a religious ritual. But is the 12th product really adding as much value as the first?

In economics, the law of diminishing marginal returns states that adding more of one input — while keeping others constant — will eventually yield smaller and smaller increases in output.

Your Skincare Routine Is a Production Function

Think of your appearance as the output of a production function where the inputs are time, money, and products. The first few inputs (cleanser, moisturiser, sunscreen) have high marginal returns. But that £85 serum? The returns are… questionable.

“After a certain point, every extra pound spent on beauty products yields less satisfaction than the pound before it.”

The Sunk Cost Fallacy

How many of us keep using a product simply because we paid good money for it? This is the sunk cost fallacy — making decisions based on what you’ve already spent rather than what you’ll gain going forward.

A Better Investment Portfolio

What if you redirected even half of that beauty spend into actual financial assets?

• £100/month into an index fund at 7% average annual return
• After 10 years: approximately £17,300
• After 20 years: approximately £52,000

That’s the real opportunity cost of your 12-step routine.