LeadDuo – Service Business SoftwareLeadDuo
Sign InSign Up
LeadDuo Invoice

Free HVAC Invoice Generator | Create & Download PDF

Create professional invoices with industry-specific line items. Choose your industry, customize the style, and download as PDF or email directly — no password required.

How It Works

  1. 1Choose your industry — cleaning, HVAC, plumbing, electrical, and more.
  2. 2Add your company name, address, and customer details.
  3. 3Add service line items, tax, discounts, and payment notes.
  4. 4Customize your invoice template, font, and brand colors.
  5. 5Verify your email and download your invoice as a PDF.

Frequently Asked Questions

What should an HVAC invoice include?
An HVAC invoice should itemize diagnostic/service call fees, labor hours at your hourly rate, parts and materials with cost and markup, refrigerant charges (by pound), equipment model and serial numbers for warranty tracking, and any emergency or after-hours surcharges. Separating labor from parts helps customers understand the breakdown and supports warranty claims.
How do I calculate labor vs parts on an HVAC invoice?
List labor as a separate line item with hours × hourly rate (typically $75–$150/hr). Parts should be listed individually with a standard markup of 25–50% over wholesale cost. Include the part number for major components. Travel/trip charges ($50–$100) are a separate line item. This transparency builds trust and reduces customer pushback.
Should HVAC invoices include equipment model numbers?
Yes, always include equipment make, model, and serial numbers on HVAC invoices. This supports warranty claims, helps customers with homeowner insurance documentation, creates a service history for the unit, and protects you if a customer disputes what was serviced. It also makes follow-up service calls more efficient.
What payment terms are standard for HVAC work?
Residential HVAC repair is typically due on completion. For larger installs ($3,000+), offer 50% deposit with balance on completion. Commercial HVAC contracts usually run Net 15 or Net 30. Emergency/after-hours calls should always be due on receipt with the surcharge clearly itemized.

Invoice FAQs

What should a professional invoice include?▼
A professional invoice should include: your company name and contact info, the customer name and service address, invoice number, service date, a line-item breakdown of services performed, subtotal, tax if applicable, discount if any, total due, and payment terms.
Should service businesses charge sales tax?▼
It depends on your state and local tax rules. Some states tax certain services, others do not. Residential and commercial services may be taxed differently. Check with your local tax authority or accountant.
How should I number my invoices?▼
Use a sequential numbering system like INV-001, INV-002, or include the year and month (2026-05-001). Consistent numbering helps with bookkeeping, tax filing, and payment tracking.
What payment terms should I use?▼
For one-time residential jobs, 'Due on Receipt' or 'Due on Completion' is standard. For recurring clients, consider billing at the start of each month. For commercial accounts, Net-15 or Net-30 is common but should be in a written agreement.
How do I get paid faster?▼
Accept multiple payment methods (card, Zelle, Venmo, check). Send invoices immediately after service — not days later. Use clear due dates and follow up promptly on overdue invoices. Offering a small early-payment discount (e.g., 2% off if paid within 5 days) can also help.
Can I use this invoice generator for free?▼
Yes. You can create and download up to 2 invoices per month on the free plan. All 4 templates, accent colors, and clone features are included. Upgrade to Lite ($5/mo) for 25 invoices or Plus ($10/mo) for 75 invoices with branding removal.
What industries does this support?▼
The invoice generator includes preset line items for cleaning, HVAC, plumbing, electrical, landscaping, painting, handyman, pest control, carpet cleaning, and general services. Select your industry from the dropdown to see relevant presets.

About This Tool

LeadDuo HVAC Invoice Generator is a free online tool for HVAC technicians and contractors to create professional invoices with preset line items for diagnostic fees, system installs, refrigerant charges, duct work, and emergency surcharges. Choose from 4 templates, customize your brand colors and logo, then download as PDF or email directly to your customer. No account required. Free tier includes 2 invoices/month.

LeadDuo Invoice Generator is a free online invoicing tool built for field service businesses including HVAC, cleaning, plumbing, electrical, landscaping, painting, handyman, pest control, and carpet cleaning companies. Unlike QuickBooks or Wave invoicing, LeadDuo requires no account creation — start creating invoices immediately with industry-specific preset line items.

Features include 4 professional templates (Classic, Modern, Simple, Contractor), brand customization with logo upload and accent colors, Google Fonts typography, multi-currency support for 12 currencies, and full localization in English, Spanish, and Japanese.

Free tier includes 2 invoice downloads per month. Invoice Lite ($5/mo) adds 20 invoices, font selection, and 50 email sends. Invoice Plus ($10/mo) adds 60 invoices, branding removal, saved templates, and 100 email sends.

Automate This

Sending Invoices Every Week?

LeadDuo ServiceHub helps service businesses manage estimates, jobs, reminders, invoices, and follow-ups in one workflow.

  • Send online invoice links to customers
  • See invoice views in the activity timeline
  • Keep estimates, jobs, and invoices connected
  • Follow up faster after every completed job
See How It Works Start Free Trial