A spiff is a short-term, per-item bonus an HVAC or plumbing shop pays on top of base pay — announced in advance for one specific action: selling a maintenance agreement, attaching an accessory, producing a lead.
The BLS and DOL sources we checked publish no typical spiff amounts, so how much they are worth has one honest answer: the written plan in front of you.
This page explains how spiff programs work and the pitfalls to watch for.
What a spiff is
A spiff is a short-term incentive tied to one specific action — selling a maintenance agreement this month, attaching an accessory to a changeout, handing over a lead that books.
It pays per item, it is announced in advance for a defined window, and it stacks on top of a base structure rather than replacing it: an hourly tech, a flat-rate tech and a commissioned tech can all run under the same spiff.
The boundaries matter.
A bonus is the broad category — production, quality, attendance, retention, year-end.
A spiff is the per-item, short-window slice of it.
Commission pay is different again: a standing share of the ticket that runs on every job, not a one-off payment for one item.
The full map — hourly, flat rate, piece rate, commission, spiffs — is compared side by side in our guide to tech pay structures.
Everything about a spiff is the shop's choice: which items carry one, how much each pays, how long the window runs, and what triggers the payout.
The one feature that reaches into wage law is the announcement.
A spiff schedule posted in advance is a promised payment — and promised payments follow you into the overtime math covered below.
Common spiffs and typical amounts
A spiff can attach to whatever line the shop wants to move.
The categories this page walks through: service agreements and memberships — the recurring maintenance plan the customer renews — and accessories and upgrades attached to an install or changeout, with leads covered in the next section.
Which lines carry a spiff in a given month is the shop's call, and the lineup moves: a plan that pays on agreements one month may pay on something else the next.
Now the honest part of the heading: the BLS and DOL sources we checked publish no typical spiff amounts.
The dollar figures quoted around the industry come from consultant and member surveys we could not verify.
Treat any specific number you hear — in a Facebook group, a recruiter's pitch, a training video — as a starting question, not a market rate.
That makes a spiff's worth a local question with a knowable answer: the written schedule for the current window.
What a spiff adds to your paycheck also has to be read against the base it stacks on — and base pay does have verifiable benchmarks.
In the BLS OEWS survey for May 2025, released May 15, 2026, the median wage is $29.33 an hour, or $61,010 a year, for HVAC mechanics and installers (SOC 49-9021), and $30.67 an hour, or $63,800 a year, for plumbers, pipefitters, and steamfitters (SOC 47-2152).
The state tables sit on the HVAC technician salary and plumber salary pages.
Judge the plan in front of you
Lead-generation bonuses
Lead bonuses pay for new business you uncover: the neighbor who mentions a dying air conditioner, the property owner with a dozen aging furnaces, the restaurant whose walk-in keeps tripping.
What a lead is worth — and when it pays — is defined by the plan, and the definitions vary enough that you should ask before counting on one.
Does the spiff pay on the lead itself, or only when it becomes a booked job?
Does an unsigned estimate or a cancelled booking still qualify?
Get the trigger in writing the same way you would a commission percentage.
The wage-law treatment matches any other spiff.
A lead bonus announced in advance is a promised payment — the employer has committed to pay when the trigger fires — and promised production bonuses belong in the regular rate used for overtime.
A shop that runs lead spiffs but keeps them out of the overtime math is not running a generous program; it is showing you one of the red flags covered in the last section.
How spiffs change your overtime rate
Under the Fair Labor Standards Act, hours worked past 40 in a workweek earn a half-time premium on top of your regular rate — and bonuses count in that regular rate unless they fit one of the law's listed exclusions, such as truly discretionary bonuses or gifts on special occasions.
A spiff almost never fits the exclusion.
A bonus stays out of the math only when the employer decides both whether to pay and how much at or near the end of the period, with no prior promise — and a spiff schedule announced in advance is the opposite of that: if the employer promises in advance to pay a bonus, the regulations say, it has abandoned its discretion.
Production bonuses, quality and accuracy bonuses, attendance bonuses and bonuses contingent on staying until the payment date are all in the must-include category, and the label a shop puts on a payment does not decide the question — the facts do.
The arithmetic is the regulation's own example.
A tech paid $12 an hour works 46 hours in a week and earns a $46 bonus: the week's earnings total $598, which divides by 46 hours to a $13 regular rate, so each overtime hour is owed $19.50 — not the $18 a base-rate-only reading would pay.
The bonus raised the rate the overtime is computed from, which is exactly why shops that leave it out pay overtime short.
Timing changes the mechanics, not the right.
A promised payment earned and paid in the same week — a weekly commission or spiff — is added to that week's other earnings and divided by all hours worked to set that week's regular rate.
Payments that cover several weeks or arrive later — a monthly agreement spiff, a quarterly install bonus — can be left out of the weekly math until their amount is known, but once known they must be apportioned back over the weeks they were earned, and each of those weeks with overtime hours gets its extra premium paid.
A monthly commission that cannot be tied to specific weeks is allocated by multiplying it by 12 and dividing by 52 — the regulation's own formula.
The base the spiffs ride on does not change any of this.
Commissions count in the regular rate as pay for hours worked.
Flat-rate techs compute overtime from total job pay divided by hours actually worked, with the half-time premium for hours over 40 — and spiffs paid alongside a flat-rate base fold into the same rate.
The commission exemption, FLSA Section 7(i), is narrow: it covers commissioned employees of a retail or service establishment only when the regular rate is more than one-and-a-half times the minimum wage and more than half of pay is commissions — and whether an HVAC or plumbing shop qualifies as retail is decided case by case.
Do not assume it covers your shop.
One boundary this page cannot draw: some spiff-style payments come from outside your employer — a distributor or manufacturer promotion that pays the tech directly.
How those third-party payments interact with the employer's overtime math was not covered by the sources behind this page.
If manufacturer-paid spiffs are part of your paycheck, put that question to the Wage and Hour Division or an employment attorney.
Wage rules change — confirm with the enforcers
Red flags in spiff-heavy shops
In a spiff-heavy shop, a visible slice of the paycheck rides on per-item counts, and that creates the two pitfalls this page has been building toward: selling pressure you feel and math your employer might skip.
The selling pressure is structural.
When agreements and accessories carry a spiff, the pull is to recommend from the spiff sheet rather than from the equipment in front of you.
Managed honestly — a recommendation the system genuinely needs, explained plainly — a spiff rewards real value, the same alignment that makes commission work.
Shaded, it turns every ticket into a pitch, sells customers work they do not need, and spends the trust that gets a tech invited back into attics and mechanical rooms.
Before taking a spiff-heavy job, ask how the shop draws that line: what techs are expected to recommend, and what they are barred from doing.
The math pitfall is cheaper to check than the culture one.
The rules are settled for promised spiffs: they belong in the regular rate, and deferred ones owe a true-up when they pay.
So watch for the patterns that dodge them:
- No written spiff schedule — the amounts, items, window and trigger live in a manager's head, so nothing can be checked later.
- The plan is announced in advance but the paycheck computes overtime on base pay alone — an announced spiff is a promised, non-discretionary bonus, and the "discretionary" label does not make it otherwise.
- Monthly or quarterly spiffs pay out with no apportioned true-up on the weeks where you worked overtime.
- Payouts are casual — cash, gift cards, "handled off payroll" — so no record on your pay stub exists to check the math against.
- The lineup or amounts change mid-window without notice, or payouts arrive short with no explanation.
- Pressure to attach an agreement or accessory to every ticket, regardless of what the equipment needs.
Protect yourself with a record of your own: hours worked each week, spiffs earned and when they paid.
If the overtime math looks short once promised spiffs are folded in the way this page describes, take the numbers to the U.S. Department of Labor's Wage and Hour Division or your state labor department rather than absorbing the difference.
Career information, not legal or pay-law advice — confirm your own situation with the U.S. Department of Labor's Wage and Hour Division or your state labor department.