HVAC advances: before or after the season?

Before, if you run an install shop and you are taking one at all. Not because a rule says so, but because a fixed remittance does not know what month it is, and the month decides three things about the money: how big the debit is set, which months it runs through, and whether the thin months come while the cash is still in the account or after it is gone. Here is the calendar with the debit on it.

What a fixed payment does across an HVAC year

An HVAC year has two peaks and two troughs. Installs run with the heat and the cold. Between them sit the shoulder seasons, spring and fall, when the cooling calls have stopped and the heating calls have not started (ACHR News on the shoulder seasons, 2026-09-24), each running six to ten weeks (a call-centre analysis of their length, 2026-09-24). Where exactly they fall depends on your climate; the shape does not.

Put a shop on that calendar, as an illustration and not a description of any business. An install-heavy shop that deposits about $110,000 in July and about $40,000 in October, the same shop as the HVAC page's $25,000 peak week and $9,000 shoulder week. Then put the site's usual advance on it: $40,000 at a factor rate of 1.30 remits $52,000, about $310 a working day, about $6,500 a month, over eight months. The table shows what that debit takes out of each month, and the two rows underneath show the same eight-month term started in March and started in September.

Illustration, not a quote. Every deposit figure is invented for the table; the debit is the site's anchor, worked in full on the advance guide. Real terms come from a funding partner.

Read the two term columns. The March term meets the spring trough in its first two months and the fall trough in its last, and spends June, July and August under 8%. The September term meets the fall trough in its second month, the whole winter, and the spring trough in its last two, the two worst months on the calendar; its easiest months, December and January, sit at about 8%. Add up the deposits each term runs through and the same $52,000 is about 9% of the March term's deposits and about 11% of the September term's. Same rate, same amount, same eight months. The calendar did that.

Why September is the riskiest month to start

The table shows one of the three effects. The other two are in the file and in the order the months arrive.

How the advance is sized

In my read of how these files are underwritten, a funder fixes the daily or weekly debit off the average of the months it can see, which is the last few months of bank statements. So the month you apply decides what the funder sees. On the illustration, a file read in September shows June, July and August, and averages about $103,000 a month. A file read in March shows December, January and February, and averages about $77,000. The eight months each term then meets average about $58,000 from September and about $70,000 from March. The September file describes a shop almost twice the size of the one the debit will have to come out of. The March file describes one about a tenth larger, which is close enough to the truth to be safe. A debit sized off the September file is set for a business that will not exist again until June.

Which months the term meets

Count the trough months inside each term. From March: the spring trough at the start and the first weeks of the fall trough at the end. From September: the fall trough, then the winter, then the spring trough, both troughs and the whole cold season inside one term. Eight months from September is the longest stretch of the HVAC year you could pick to remit a fixed amount through.

Where the thin months fall

This is the one nobody writes down. From March, the two thinnest months are the first two, and the $40,000 has just landed. Part of the March and April debit is paid out of the advance itself, which is not elegant, but it is safe: the money is in the account. From September, the two thinnest months are the last two, in March and April of the following year, and the advance was spent on whatever it bought seven months earlier. The debit in month eight comes out of April's $38,000 with nothing behind it. An advance that starts before the season fails early, while you can still see it; one that starts after fails late, when you cannot.

Install shop or service shop: your slow months differ

The table is an install shop's year, and not every shop keeps that calendar. Installs peak with the heat and the cold. Service calls run on a different clock: telematics from a large fleet of service vehicles put service demand at a February low, climbing to an October peak, with a dip in September (Samsara's trip data, 2026-09-24). So a shop that lives on repair and maintenance calls has its worst month in February, not April, and its best in the season turns rather than in July.

That changes the answer without changing the arithmetic. For a service-heavy shop, "before the season" means before the October turn, and a term that has to cross February is sized against February's deposits, whatever the summer looked like. Before you pick the month, pull twelve months of statements and mark the two lowest. Those two months are your calendar, and they are the only months the debit needs to clear.

Does the payment go down in a slow month?

The pages selling the product all say the same thing about seasonal businesses: take it before the season, and do not worry, because the remittance flexes with your sales. Half of that is right. A card split does flex: the processor holds back a share of each day's card takings, so a thin week remits less on its own. A fixed daily or weekly debit from the bank account, which is the common shape, does not flex. It flexes only if the contract has a reconciliation clause and you invoke it, in writing, inside a window, with statements attached. The shapes guide shows how to tell which one you are being offered from the contract.

If your offer is a genuine split, the month matters less and the total matters more: a thin October remits less and the term stretches, and the $12,000 does not change. If it is a fixed debit, everything on this page applies in full.

A four-step check before you sign

Four steps, with a calendar and your own statements.

1. Mark your two troughs. The two lowest deposit months in the last twelve. For an install shop, usually one in spring and one in fall; for a service shop, usually February and September.
2. Count from the month the money lands to the first trough that follows, and to the second. On the illustration, from March the first is immediate and the second is seven months out; from September the first is next month and the second is six months out.
3. Put the term from the quote against those counts. A term that ends before the second trough meets one thin stretch; a term that crosses it meets two.
4. Test the debit against the thinnest month inside the term, not against the average, and not against the month you are in. If the debit is more than you could carry in that month with the phone quiet, the term is too short for the amount, or the amount is too large for the month.

A shorter term is the obvious fix and it has a price. Six months from March ends in August, before the fall trough, and the same $52,000 becomes about $8,700 a month: 19% of March and 23% of April, while the advance is still in the account, then under 10% from June. That trade can be right. It is still a trade, and the quote should show both numbers before you decide.

If you need money now, in the fall

Then the fall trough is in front of you, and the honest answer depends on what the money is for.

If it is for spring stock or a spring hire, wait. The manufacturers' stocking programs and the distributors' early-buy windows sit in spring anyway, and hiring for the summer starts in late winter with listings rising in March and April (HVACR Career Connect, 2026-09-24). Money taken in September for a March purchase is remitted through the two worst months on the calendar before it has bought anything.

If the need is now, a truck off the road or a fall hire you cannot cover, then in order:

• A term that ends before March. Four or five months from September ends in December or January, after the fall trough and before the spring one. Run step four above against October.
• The split shape, if it is offered. A thin October then remits less by itself.
• The maintenance book. Agreement billing puts deposits into exactly these months. It is not fast money, and it is the only one of these that makes next September easier as well.
• A line of credit, if one is open to you. The shape built for a gap you can put a date on: draw now, repay when the season lands. As an illustration, $20,000 drawn in September at 24% a year and cleared over nine months in level payments costs about $2,050 in interest, against $6,000 for the same $20,000 as an advance at 1.30, whenever you remit it. Illustration, not a quote; the 24% is the starting position on the line-of-credit calculator, and the line-of-credit page says who it is usually open to. Early in a business's life it often is not, and then the list above is the list.

And if the money is for a hole rather than for something that earns before March, none of these is the answer, and I would rather say so than talk around it. If nobody has quoted you yet and you want to see what a partner would read, the form takes about two minutes, asks for a band rather than a figure, and I do not run credit on it.

Hiring for the season works the same way

The other spring purchase is people. An installer and a helper hired in March are trained by the first heat wave; hired in July, they learn on your busiest week. The money that carries them is ten to twelve weeks of wages before their billing catches up, and it runs on the same calendar as the stock: out in March, back from June. Which is the March column of the table, and the reason a spring advance that pays for a crew can make sense where a September one for the same crew would remit through the winter for people who have not started yet. Partners decide what they offer; the calendar is yours to read first.