HVAC & Plumbing CPA Services

Whether a job is a retail sale of tangible personal property or an improvement to real property changes who bears the sales and use tax on the materials and whether you should be collecting it from the customer. Replacing a unit, repairing one, and selling one over the counter can land in different places. The distinction is fact-specific, it is not settled by how the invoice is worded, and it is much cheaper to work out once for your standard job types than to reconstruct it under audit.

Parts riding on the vans are the smallest ledger in the business and the most often ignored. Whether they have to be inventoried, or can be treated as materials and supplies, turns on your method of accounting and the same indexed gross receipts test that governs smaller contractors. Either way, a count that only happens when the accountant asks for one is a number nobody can rely on.

Write-offs on vehicles are not a single rule: how a vehicle is classified and what it weighs change what is available, and the choice between mileage and actual costs is made per vehicle and is not freely reversible later. What makes it work is per-vehicle records kept during the year — miles, fuel, repairs, personal use — because reconstructing them afterwards is exactly what does not hold up.

Charleston summers put an outsized share of the year's profit into a few months. Paying estimates in four equal installments against a year shaped like that either overpays early or underpays and takes the penalty. The annualized installment method lets the payments follow the income instead, which is one of the few penalty questions with a clean answer.

A plan collected in January for work performed across the year is an advance payment, and how much of it is this year's income depends on your method of accounting. Accrual-method taxpayers can often defer part of it by a year; cash-method taxpayers generally cannot. It is worth knowing which you are before the plans are sold, not after.

Reimbursing technicians for tools, phones or mileage under an accountable plan keeps those payments out of wages. Without the substantiation the plan requires, the same payments become taxable compensation with payroll tax attached — a paperwork failure that turns into a real tax cost.

Homeowners will ask what federal credit a new system qualifies for. Those credits belong to the homeowner rather than to you, and Congress has changed both their scope and their expiration dates more than once, most recently in 2025. We will tell you what is actually current for the year in question instead of what a manufacturer's brochure says — and we will not build a marketing claim on a credit we have not checked.

An owner working in the field still has to take reasonable compensation as wages before taking distributions. Set it too low and it is an examination issue; set it without reference to what the role would cost to hire and there is nothing to defend it with.