The short answer
Spend ahead of demand, and never fully switch off.
Adjust seasonal ad spend by following your own demand curve: raise budgets a few weeks before your busy season, keep them high while your crew can take the work, then cut back without switching off when demand drops, and point the slow-season budget at offers that fill the calendar. The common mistake is reacting late. They raise the budget once the phone is already ringing and kill it the day things slow down.
Every trade has its own curve. HVAC has two peaks, one for cooling and one for heating. Landscaping, garden centers and outdoor projects surge in spring. Roofing follows storms and the push to finish before winter. Plumbing stays steadier but spikes in a hard freeze. Pest control climbs in warm months. Your own curve may not match the textbook version for your trade, which is why it has to come from your records.
Map your year
Build the calendar from your calls, jobs and searches.
Before you set a single monthly budget, look at what happened in your business the last two years. You want to see when demand starts climbing, when it peaks, when it fades and how long the quiet stretch lasts.
- 1
Pull your own numbers
Calls, form leads and booked jobs by month for the last two years, split by service if you can.
- 2
Check search demand
Keyword Planner shows monthly search trends for your services. Google Trends shows the shape of interest in your area.
- 3
Mark your capacity
Note the months your crew is booked solid and the months you have open slots. Ads should fill gaps, not overload a full board.
- 4
Name your seasons
Ramp, peak, taper and slow. Give each a budget, an offer and the campaigns that run in it.
Split urgent work from planned work when you do this. Emergency repairs follow the weather. Planned projects, like a new patio or a system replacement, follow the homeowner’s calendar and often get researched weeks or months before they’re booked. That means the ads for planned work need to start earlier than the ads for repairs.
Peak season
Ramp early, then spend where jobs book cheapest.
Raise budgets a few weeks before your calls usually pick up. That gives the campaigns time to settle and puts you in front of the early searchers, who often book first. Once peak hits, competitors raise their bids too and click costs climb.
During peak, the number to watch is impression share. It compares how often your ads showed with how often they could have shown. If your best campaigns are losing impression share because the budget runs out, you’re missing searches you could have won. Read Google’s impression-share definition Impression share tells you about visibility, not jobs, so pair it with cost per booked job before you add money.
A bigger budget also buys more junk if you let it. Read the search terms report every week during peak and keep adding negatives. Then watch capacity. When the crew is booked out, trim spend on the services you can’t schedule, update the ad text to your honest wait time, and keep the campaigns for longer-lead work running so the next month stays full.
Off-peak months
Cut back, change the offer, keep the lights on.
Turning ads off completely in the slow season feels like saving money, but it costs you on the way back. When you restart a campaign after a long pause, or change its bid strategy, automated bidding can take time to recalibrate, and performance can wobble right when you need it most. Google’s bid strategy status page explains the learning period. Read Google’s status guidance
A pause doesn’t hurt your Quality Score. Quality Score is a diagnostic Google shows you, not an input to the auction. Read the Quality Score definition The real costs of going dark are lost conversion data, a cold restart and an empty calendar when the season turns.
Lower the budget, keep the core
Keep your highest-converting keywords and your brand name running. Cut the broad, expensive terms that only pay off in peak.
Switch to off-season offers
Maintenance plans, tune-ups, inspections, early-booking discounts, design consultations for spring projects. Sell what people buy when nothing is broken.
Tighten the map
Pull back to the towns closest to your shop, where drive time is short and close rates are highest.
Use the time to fix things
Rebuild a weak landing page, test new ads, clean up negatives. Changes made in the slow season are ready for the rush.
What it looks like
Two accounts that got more out of the same season.
Dixie Glass, a glass company on the Mississippi Gulf Coast, saw 76% more Google Ads conversions one January than the January before, 116 against 66, with ad spend up only 2.29%. Same month, nearly the same budget, far more leads. Comparing a month with the same month a year earlier is the fairest test for a seasonal account. Read the Dixie Glass case study .
Drake’s 7 Dees, a garden center and landscaping company, lives and dies by spring. Its Google Ads converted at 26.4%, and the business brought in 744 leads in 60 days. Read the Drake’s 7 Dees case study .
A tool people misuse
Seasonality adjustments are for short events, not slow months.
Google Ads has a feature called seasonality adjustments. It tells Smart Bidding to expect a big jump or drop in conversion rate for a short, specific window, like a few days of a major promotion. Google says Smart Bidding already handles ordinary seasonal patterns on its own, so you don’t need it for a normal busy summer or slow winter. Read the tool’s intended use
Your real seasonal plan lives in your budgets, your offers and your campaign mix. Write it down at the start of the year: the budget, offer and campaigns for each season, and the number you’ll check to decide whether to change course. Then adjust from what the account shows you. Lithium’s Google Ads management starts at $500 a month plus ad spend and includes a monthly report in plain jobs and dollars, so the seasonal plan gets revisited every month.
