Tax Deductions for Plumbers, Electricians, and HVAC Technicians: What Actually Qualifies

A self-employed plumber, electrician, or HVAC technician can deduct nearly every cost of running the business: tools, the work truck, licensing fees, continuing education, uniforms, tool insurance, and a portion of the cell phone bill. The test is whether the expense is ordinary and necessary for the trade under IRC 162. A W-2 employee working for someone else’s shop gets almost none of this. The Tax Cuts and Jobs Act suspended unreimbursed employee business expenses starting in 2018, and the OBBBA made that suspension permanent, so a journeyman who buys his own $4,000 tool set out of pocket cannot deduct a dime of it unless he is self-employed or the deduction survives through his employer’s reimbursement plan.

What’s the “ordinary and necessary” standard?

IRC 162(a) allows a deduction for “all the ordinary and necessary expenses paid or incurred” in carrying on a trade or business. Ordinary means common and accepted in the trade. Necessary means helpful and appropriate, not indispensable. A $6,000 sewer camera is ordinary and necessary for a plumbing business that clears drains; the same camera is a stretch for an electrician with no plumbing work, absent a real business reason.

Three practical consequences follow from that standard.

• Trade-specific tools count, generic ones need a business-use tie-in. A pipe threader, a refrigerant recovery machine, a multimeter rated for the technician’s specific certification level: all clearly ordinary and necessary. A pickup truck used half for hauling materials and half for the technician’s personal life needs a business-use percentage.
• The expense has to actually be paid or incurred, and it has to be the taxpayer’s own money. If a general contractor supplies the tools and the sub-tradesperson never pays for them, there is nothing to deduct. If an employer reimburses tool costs under an accountable plan, the employee cannot also deduct them.
• Personal enjoyment doesn’t disqualify a deduction, but it triggers scrutiny. A technician who takes a HVAC manufacturer’s training class in Las Vegas can deduct the course fee and travel, but the IRS looks harder at trips that mix business content with vacation days, per the travel rules under IRC 274.

What can a self-employed tradesperson actually deduct?

The categories below cover the deductions that come up in nearly every plumbing, electrical, and HVAC return. Two others (vehicles and equipment depreciation) are big enough to need their own treatment; see the linked guides below.

• Tools and small equipment. Hand tools, power tools, testing equipment, and diagnostic gear are deductible in the year purchased, either under the de minimis safe harbor (items under $2,500 per invoice line, expensed immediately without a fixed-asset ledger entry) or under Section 179/bonus depreciation for pricier gear. A $180 impact driver is a de minimis expense. A $9,000 pipe-bending machine is a Section 179 or bonus depreciation asset.
• Licensing and continuing education. State license fees, journeyman or master license renewal, code-update classes required to keep the license current, and trade certification exams (EPA 608 for HVAC refrigerant handling, backflow-prevention certification for plumbers) are fully deductible. This includes the cost of the class itself, required study materials, and travel to attend it.
• Uniforms and protective gear. Deductible only if the clothing is not suitable for ordinary everyday wear, per long-standing IRS guidance under IRC 262 (personal expenses are not deductible, and everyday-wearable clothing is treated as personal even if it’s only worn at work). Flame-resistant coveralls, steel-toe boots required by a jobsite, safety glasses, hard hats, and gloves qualify. A plain company-logo polo shirt is a gray area some preparers deduct and others don’t; a branded shirt with a required logo that a technician would not otherwise wear is the stronger position.
• Cell phone. Deductible at the business-use percentage. A technician who uses one phone for dispatch calls, customer texts, and personal calls needs a reasonable allocation (a call log for a representative month is the cleanest support), not a 100% write-off unless there is a dedicated business line.
• Home office for dispatching and admin. A spare room used regularly and exclusively to schedule jobs, do invoicing, and manage the business qualifies under IRC 280A(c)(1). This is common for trades because the “office” is genuinely a dispatch and paperwork function, not a storefront. The simplified method ($5 per square foot, up to 300 square feet, capped at $1,500) is the easiest route; the actual-expense method (a percentage of rent/mortgage interest, utilities, insurance, and depreciation) usually produces a bigger deduction for a homeowner but requires more recordkeeping.
• Insurance. General liability, commercial auto, workers’ comp, and tools/equipment inland marine coverage are all deductible premiums under IRC 162. See the dedicated guide below for cost benchmarks by trade.
• Association dues and trade publications. Union dues, trade association memberships (PHCC, NECA, ACCA), and subscriptions to trade journals are deductible.
• Bank and merchant fees, software. Payment-processing fees, QuickBooks or field-service software subscriptions (ServiceTitan, Housecall Pro, Jobber), and business bank account fees are all ordinary business expenses.

The deduction picture compared, self-employed vs. W-2

The gap below is exactly what changed under the TCJA, and it’s why entity and classification choices covered elsewhere in this guide have real deduction consequences, not just payroll ones.

Expense category	Self-employed (Schedule C)	W-2 employee
Tools and small equipment	Fully deductible (de minimis safe harbor or Section 179)	Not deductible unless reimbursed under an accountable plan
Licensing and continuing education	Fully deductible	Not deductible unless reimbursed
Uniforms and safety gear	Fully deductible if not suitable for everyday wear	Not deductible unless reimbursed
Cell phone (business-use share)	Fully deductible	Not deductible unless reimbursed
Home office for dispatching	Deductible under IRC 280A(c)(1)	Not available to employees
Vehicle costs	Fully deductible at business-use percentage	Not deductible unless reimbursed

What happens if I’m a W-2 employee instead of self-employed?

Nothing good, tax-wise. Before the TCJA, a W-2 tradesperson could deduct unreimbursed tool costs, union dues, and uniforms as a miscellaneous itemized deduction on Schedule A. The TCJA suspended that entire category under IRC 67(g), which eliminated the deduction outright rather than just capping it. A journeyman who spends $3,500 a year on his own tools and gets a W-2 has no federal deduction for that spend, unless he has self-employment side income the tools also serve, or his employer runs an accountable plan.

• Accountable plans are the real fix. An employer can reimburse tool and uniform costs tax-free to the employee if the reimbursement plan meets the accountable-plan rules under Reg. 1.62-2: a business connection, substantiation (receipts), and return of any excess. Money that flows through an accountable plan is not wages, not subject to payroll tax, and not income to the employee. Shops that supply a tool allowance often do this without realizing there’s a formal structure behind it; getting the paperwork right is what keeps the IRS from recharacterizing the allowance as taxable wages on audit.
• State returns can differ. A handful of states (California is the notable one) did not conform to the TCJA suspension and still allow the 2%-of-AGI miscellaneous deduction on the state return even though it’s gone federally. A W-2 tradesperson working in a non-conforming state should still track tool and uniform receipts for the state return.
• The suspension is now permanent. The One Big Beautiful Bill Act made the elimination of miscellaneous itemized deductions permanent. The TCJA suspension was originally set to expire after 2025, but the sunset was removed. A W-2 tradesperson will not be able to deduct unreimbursed tool and uniform costs as an employee expense in any future year absent new legislation. Accountable plans and self-employment status remain the only paths to deducting these costs.

How does employee vs. self-employed status change things?

Whether a tradesperson is a W-2 employee or a self-employed contractor is not a choice made on the tax return; it’s a factual determination the IRS and Department of Labor apply based on control and economic dependence, and it drives the deduction question above along with the entity-structure and payroll questions covered elsewhere in this cluster.

• Self-employed (Schedule C, LLC, S-corp). Full IRC 162 deduction access as described above. Also responsible for self-employment tax and quarterly estimated payments.
• W-2 employee. No unreimbursed expense deductions (the suspension is now permanent, as noted above). No self-employment tax; payroll tax is withheld and matched by the employer.
• Misclassified. A tradesperson treated as a 1099 contractor by an employer who actually controls the work like an employee is a compliance problem for the business, not a deduction opportunity for the worker. See the classification guide below for the ABC test and the penalties an employer faces for getting this wrong.

What records do I need to survive an audit on deductions?

The IRS scrutinizes vehicle and tool deductions more than most Schedule C line items because they’re common and easy to overstate. Keep receipts (not just credit card statements, which don’t show what was purchased) for every tool and equipment purchase, a business-use log for the cell phone and any listed property, and a simple statement of the home office’s regular and exclusive business use. For uniforms, keep a note of why the item isn’t suitable for everyday wear if it’s not obviously specialized (steel-toe boots are obvious; a company polo is not, so a photo and a note about the required logo helps).

What should I do next?

If you’re self-employed and haven’t been tracking tool and equipment purchases separately from personal spending, start a simple log now, even a spreadsheet with date, item, cost, and business purpose. If you’re a W-2 tradesperson fronting your own tool costs, ask your employer whether an accountable reimbursement plan exists; if not, that’s a conversation worth having before the current TCJA suspension changes again.

• Vehicle expenses for tradespeople, mileage vs. actual cost and the heavy-vehicle exception that avoids the luxury auto caps
• Section 179 and bonus depreciation for trades equipment, the full depreciation picture for tools, trucks, and heavy equipment
• Licensing, bonding, and insurance for tradespeople, cost benchmarks and the tax treatment of premiums vs. bond principal
• Best entity structure for a trades business, when the S-corp election starts saving more than it costs
• Construction contractor tax deductions, the broader contractor picture including WIP accounting and UNICAP thresholds

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.