Most HVAC companies offer preventative maintenance plans that cost between $100-$300 per year for a basic plan covering two tune-up visits (spring and fall). More comprehensive plans that include additional services like air filter replacements, minor repairs, and discounts on larger repairs typically range from $200-$500 annually. Prices depend on factors like the size of your HVAC system, your location, and the company. While an upfront cost, regular professional maintenance helps extend equipment life, improve energy efficiency, prevent costly breakdowns, and ensure proper operation - often paying for itself through lower utility bills and repair costs over time.