By late August, the tune-up calls start thinning out. Cooling season isn't over, but it's not the free-for-all of July anymore, and heating season is still weeks away. For most HVAC business owners, this stretch — roughly August through October — gets treated as something to survive rather than something to use.
That's the wrong way to think about it. The shoulder season is slower, not empty. Call volume drops, but overhead doesn't. Payroll still runs. Trucks still need fuel. Owners who come out of October in better shape than they went in usually used the lull on purpose—smoothing cash flow, keeping the crew productive, and tackling the kinds of decisions that never get proper attention when the phones won't stop ringing.
The Slow Season Isn't the Same for Every HVAC Business
Not every contractor feels the shoulder season the same way. Climate decides a lot of it. In the Deep South, cooling season can stretch well into October, so the real lull might not show up until closer to November. In northern climates, it's often the reverse — the cooling rush ends earlier, and the heating rush hasn't started yet, leaving a longer gap in September and October. HVACRBusiness provides tips for thriving during the slowdown regardless of your location and whether you have the slowdown in spring or fall.
Plumbing tends to hold up better than HVAC through this stretch, since demand isn't tied to outdoor temperature the same way. But plumbing companies that lean on HVAC referrals, or that run both trades under one roof, still feel some of the slowdown when the broader home services market cools off.
The first step in building a shoulder-season strategy is knowing your own numbers, not the industry average. Pull the last two or three years of call volume and revenue by month, and the actual shape of your slow season becomes obvious fast.
Get Ahead of Cash Flow Before the Dip Hits
Revenue dips are only a problem if cash flow dips faster than expenses do. A few habits keep that gap from opening up.
Stay on Top of Invoicing and Collections
Slow season is when unpaid invoices matter more, because less new revenue comes in behind them to cover the gap. Sending invoices the same day a job wraps, instead of batching them at the end of the week, keeps cash moving instead of sitting on a desk. It's a small habit. It compounds — especially once the season actually turns slow.
Don't Pull Back Marketing — Redirect It
In a slow month, the instinct is to cut the marketing budget along with everything else. ServiceTitan's work with HVAC contractors points the other way: pulling back marketing during a lull tends to stretch the lull out longer, because competitors who keep advertising pick up the leads still in the market. A better approach is redirecting spend rather than cutting it — shifting toward targeted email and direct mail built around maintenance plans and seasonal check-ups, instead of the broader advertising that made sense during peak season.
Some owners also use short-term working capital, like JBFin Commercial, to smooth payroll and expenses through a slower month without touching a personal cash reserve.
Keep the Crew Working When the Phones Go Quiet
Idle labor is one of the more expensive parts of a slow season, and it's largely avoidable.
Redirect Techs to Deferred Work
A slow season is the right time to work through service calls that got pushed off during the summer rush: deferred maintenance, IAQ inspections, and duct cleaning. None of it needs July's urgency, which makes it a natural fit for a quieter week.
Use the Lull for Training, Not Layoffs
Cutting hours or laying off techs during a slow month solves a short-term cash problem and creates a bigger one heading into the next busy season — rehiring and retraining costs time most owners don't have in July. The SBA's guidance on running a seasonal business points to the off-season as the window for the opposite move: building out training, refining procedures, and letting the crew rest before the next peak. For HVAC specifically, that might mean a manufacturer certification course, an internal refresher on a system type the crew doesn't see often, or simply the vacation time that never gets approved in July. A crew that's rested and current heading into heating season also tends to have fewer callbacks and turnover problems, as covered in more detail in this post on avoiding HVAC tech burnout.
Use the Downtime for Warranty and Labor-Agreement Conversations
Peak season isn't the time to renegotiate a labor warranty program or rework service agreement pricing. There's no room for it between calls, and decisions made in a rush during July tend to get revisited in August anyway.
The shoulder season is different. It's the one stretch of the year where an owner can actually sit down, look at renewal numbers, and decide whether the current program is still doing its job — recurring revenue, customer retention, protection against comeback repairs — or whether it needs adjusting. For a closer look at how the underlying business model works, this guide on the extended warranty business model breaks down pricing, structure, and the buy-versus-partner decision in more detail.
It's also a practical window to have that conversation with a warranty provider directly, instead of trying to schedule it around a July heat wave. If the current program isn't leaving room for that kind of proactive conversation, becoming a JB Warranties™ dealer is worth a look before the next cooling season ramps back up.
Turn This Into a Repeatable Shoulder-Season Playbook
The owners who handle the slow season best usually aren't reacting to it. They built a plan the year before and just run it again with small adjustments.
That plan doesn't need to be complicated. Write down what worked this year — which marketing channels brought in leads, which deferred-maintenance push filled the schedule. Note whether training got done, and whether the warranty conversation happened on schedule or got pushed to November again. Revisit it every August, before the dip actually hits, instead of during it.
A slow season handled with a plan looks like a slightly quieter version of the rest of the year. A slow season handled without one looks like scrambling — and it's a difference most owners can feel by the time heating season picks back up.
Frequently Asked Questions
When does HVAC slow season typically hit?
For most of the country, the lull falls in the gap after cooling season winds down and before heating calls pick up — roughly August through October. Timing shifts by climate: contractors in the Deep South often see their busy season stretch further into fall, while northern climates tend to hit the lull earlier - sometimes even in April. Plumbing usually holds up better, though it still feels a fall dip before Q4 picks back up.
Should HVAC companies cut marketing spend during the slow season?
Most experienced owners do the opposite. Pulling back marketing during a lull tends to stretch the lull out longer, since competitors who keep advertising pick up the leads still in the market. A better move is redirecting the budget — toward maintenance plan promotions, direct mail to existing customers, and email reminders timed around the seasonal changeover — instead of cutting it entirely.
What should techs do when call volume drops?
Idle crews are one of the more expensive parts of a slow season. Redirecting techs toward deferred maintenance visits, IAQ inspections, and duct cleaning keeps trucks running without waiting on a breakdown. The lull is also a practical window for hands-on training, since there's less pressure to rush a tech back onto the schedule.
Is shoulder season a good time to review a warranty or service agreement program?
It's often the only time an owner has the bandwidth to do it properly. Reviewing labor warranty terms, agreement pricing, and renewal processes takes focused attention that's hard to find during peak-season chaos. Many contractors use the spring/fall lull to sit down with their warranty provider and rework the program before the next cooling season ramps back up.
How can owners keep cash flow steady through a slow season?
A few habits matter most: getting invoices out the same day a job wraps instead of batching them, forecasting expenses ahead of time rather than reacting to them, and building a cash reserve during busy months specifically to cover the slower stretch. Some contractors also lean on short-term working capital tools to bridge payroll without touching personal reserves.
Does the slow season affect plumbing the same way it affects HVAC?
Not exactly. Plumbing demand isn't tied to outdoor temperature the way HVAC is, so plumbing crews typically see a milder dip. That said, companies that handle both trades, or that rely on referrals from HVAC contractors, can still feel a slowdown when the broader home services market cools off heading into fall.
How long does the slow season usually last?
There's no single number every owner can plan around — it varies by region and by how a company is positioned. Tracking call volume and revenue by month over the past couple of years gives a far more accurate read on an individual company's actual slow window than any industry-wide estimate would.
Kevin Thornton
VP & GM, Dealer Business Services Division
