Golf Lesson ROI Calculator

Two diminishing-returns factors compound as lessons accumulate: a handicap factor that shrinks as your simulated handicap drops relative to where you started (never below 30% of full effectiveness), and a fatigue factor that decays slightly with each additional lesson (never below 40% of full value). Together they model the reality that early lessons tend to fix big fundamentals while later ones polish smaller details for smaller gains.

Cost per stroke improved is total lesson spend divided by the total strokes your handicap dropped — a one-time figure. Cost per stroke saved annually instead divides that same spend by your total strokes saved across every round you play in a year, so it's a much smaller number reflecting the ongoing, repeated value of a permanent skill improvement rather than a one-time change.

A scratch golfer has no room left to improve in this model, so the calculator explicitly sets the handicap factor to zero for that case rather than dividing by zero, meaning projected handicap stays at 0 regardless of how many lessons or how high an improvement-per-lesson value you enter.

It buckets your cost per stroke improved into four tiers — under $50 is Excellent Value, under $100 Good Value, under $200 Fair Value, and above that Expensive per Stroke — as a rough qualitative gut check. It says nothing about whether the projected improvement itself is realistic, so it's only as trustworthy as the improvement-per-lesson estimate you supplied.