How HVAC Cash Flow Differs From Other Trades, and How to Get Through the Slow Months

If you run an HVAC company, the busy season can bury you in calls. Then spring and fall show up, the phone gets quiet, and payroll stays exactly the same. Those shoulder months are stressful, especially when you have a good crew you don’t want to lose and a truck payment due either way.

I work with a lot of home service businesses, and the seasonal squeeze in HVAC plays out differently than it does in most other trades. The ways to manage it are different too, so I want to walk through both.

What Makes HVAC Different From Other Seasonal Trades

Almost every trade we work with has a season. Pressure washing and window cleaning companies lose days to rain, slow down in the winter, and can lose afternoons to extreme heat. Lawn care gets hit hard by drought and heat, when the grass stops growing and customers start skipping cuts. In those businesses, bad weather is what stops the work.

HVAC is close to the opposite. The extreme weather is what creates the calls, so a brutal August is a great month, and a mild summer or a warm winter is what hurts. The slow stretches land in spring and fall when nobody is thinking about their system, and there isn’t much you can do to control how long they last.

The bigger difference is the size of the dollars. A pressure washing company might have a few hundred dollars of chemicals on the shelf and gets paid the day the job is done. An HVAC company is buying equipment that costs thousands per unit, carrying inventory, and selling installs where one job can be worth more than a week of service calls. So the cash swings are bigger in both directions, and so are the tools you have to manage them. A couple of those tools, like third-party financing and manufacturer rebates, don’t really exist for most other service businesses.

Seven Ways to Smooth Out HVAC Cash Flow

1. Treat your maintenance program as its own part of the business

Almost every HVAC company offers a maintenance plan. The ones that get the most cash flow out of it are the companies that focus on it and keep building it, since member payments keep coming in during the slow months too.

I’d try to sell the membership before you ever sell a new system. It makes them your customer, you’re in the house twice a year, and when the system finally needs replacing they call you instead of shopping three companies. That means marketing it on purpose, putting someone (or a small team) in charge of it, and making it easy for every new customer to join. Some companies cover the first year for anyone who buys a new install so that customer starts out as a member.

One of the HVAC companies we work with has grown its member base a lot this year, and it hasn’t come from anything fancy. It came from careful planning, clear communication with their customers, and then following up and doing what they said they’d do.

Let’s say you get to 800 members at around $240 a year, billed as two $120 payments six months apart. Nobody pays monthly, but since members sign up at different times of the year, those payments spread out to roughly $16k a month on average regardless of the weather. That covers a good chunk of shoulder-season payroll for a lot of shops.

The visits themselves help with the slow months too. If we book the two annual tune-ups for members in spring and fall, techs stay billable during the quiet weeks, and those visits are where a lot of repair and replacement work gets found.

2. Know the margin on installs versus service

A lot of HVAC companies look at one gross margin for the whole business. Installs and service calls usually earn very different margins, though, and one blended number can hide which side is carrying the business. One HVAC company we work with had its install and service work reported as a single number. Once we split them apart, there was a big gap between the two, and it changed how they priced, staffed, and marketed each side.

This matters for the slow months too. A strong install season can bring in a lot of revenue and still leave less cash behind than it looks like, especially if the install margin is thin. If we know the margin on each side, we know which work to push in the shoulder months and what a busy summer is leaving in the bank.

3. Use pricing and rebates to pull work into the slow months

Seasonal pricing and tune-up bundles in spring and fall can move some work out of the peak and into the months when your techs have open time. Manufacturer rebates help here too. When a manufacturer is running a rebate, passing it through to the customer can be what gets a replacement decision made in October instead of the next time the old system dies in July.

4. Offer financing through a lender

This is a big one that other service businesses don’t have. When a customer finances a new system through a bank or lending partner, the lender pays you most of the sale up front, usually somewhere around 90% to 95%, and the customer pays the lender back over time. On a $12k system, that’s around $11k in your account without waiting on the customer.

The lender charges you a fee on every financed job, so it needs to be priced in. Most companies build it into the price for every customer, not just the ones who finance. Let’s say you raise prices 5% for everyone and the lender’s fee is 8%. You give up a little on each financed job and come out ahead on every cash job. If roughly two-thirds of your customers finance, it about breaks even. If fewer customers finance than that, the cash jobs more than cover the fees. For a lot of homeowners, financing is the difference between replacing now and patching the old unit for one more season, so it’s usually worth offering as long as the price accounts for it.

5. Keep a tight handle on inventory, and take deposits

Equipment is expensive, and ordering ahead does get you better pricing. The problem is that a stack of condensers sitting on the shelf through a slow fall is cash you can’t use for payroll or anything else. As much as possible, I’d order closer to when the job is sold. Sometimes the bulk discount still wins, but I’d run the numbers on how long that inventory is likely to sit before assuming the bigger order saves you money.

Deposits help here too. Collecting a deposit when the equipment is ordered means we’re not fronting the full cost of the unit while it waits on the install date. Customers expect it on a job this size.

6. Plan labor around the dip

The shoulder months are the time for the things that pull techs off the schedule anyway. I’d push PTO, training, and certifications into spring and fall as much as possible, so nobody is out for a week in July when every tech is booked. It keeps the slow months productive and the busy months fully staffed.

7. Size the slow-season gap and set up the cushion early

If we can see the shoulder months coming, we can plan for them. The first step is figuring out how big the gap is. Pull your monthly numbers for the last year or two and put the cash coming in next to the cash going out: payroll, truck payments, rent, insurance, equipment, and everything else. The months where more goes out than comes in are the ones to plan for.

Let’s say it looks like this:

Month	Cash in	Cash out	Gap
March	$65k	$80k	-$15k
April	$60k	$80k	-$20k
October	$62k	$80k	-$18k
November	$70k	$80k	-$10k

Add up the gaps, and this company needs about $63k set aside to get through the shoulder months without stress. That’s the target for the reserve, and it gets built during the months when more is coming in than going out. From there, a cash flow forecast that looks out six to twelve months shows whether this year is tracking deeper or shallower than last. I’d also get a line of credit in place while the business looks its strongest, since a bank is a lot easier to work with in August than in March when you need the money.

Where to Start

If you want one thing to do this week, pull last year’s monthly numbers and find your two slowest months. That tells us how big the cushion needs to be.

The good news is that the slow months come around at roughly the same time every year, so they’re something we can plan around. If they’re hitting harder than you’d like, we’d be glad to look at your numbers with you. A free Cash Clarity Call is an easy place to start, and we can map out what the next twelve months look like for your business.