Marketing Economics

Your CAC isn’t a number. It’s a curve.

In home services, the same lead costs you 2 to 3x more depending on the month.

Why CAC rises in slow months

Less demand, same competition, longer sales cycles.

A tree service example: storm season (March to September) might run $45 cost per lead. Dead winter (December to February) the same campaign hits $120. Demand drops, but every competitor is still bidding, and the buyers who do call take longer to commit.

Same campaign. Same ad creative. Same crew. The cost just went up 2.7x because the calendar changed.

The instinct that kills you

Cutting budget when CPL spikes makes you invisible and expensive.

CPL jumps in November, the owner panics and slashes the ad budget. Now impression share drops, the few buyers who are searching see competitors instead of you, and when March hits you’ve given up 60 days of brand visibility you can’t buy back.

The right move is to hold the line on impression share and accept higher CAC for 60 days. You’ll recoup it in season.

How to play the curve

Three moves that work.

01
Plan ad budget around CAC, not the calendar
Some months should run hotter, some cooler. Build the annual plan from your CPL history, not from 12 equal slices.
02
Shift the offer in slow months
Winter pruning, dormant-season discounts, storm-prep packages. Give the buyer a reason to call now.
03
Build pipeline content in the off-season
Pages, posts, and reviews compound. The work you do in February earns clicks in May. Slow months are content months.

The bottom line

Going dark when CAC spikes is how owners lose seasons.

Hold impression share, shift the offer, build content. The curve is a feature, not a bug.