Home Energy Audit Savings Calculator
Example: Total annual energy bill: 3000 $ · Expected reduction from fixes: 20 % · Audit cost: 350 $ · Cost of recommended fixes: 2500 $
| Payback period | 4.75 |
| Annual savings | $600 |
| Total investment | $2,850 |
Worked example
A household with a $3,000 annual energy bill pays $350 for an audit and $2,500 for the recommended air sealing, insulation, and duct fixes, a $2,850 total. If those fixes cut the bill by 20%, that is $600 saved every year, for a payback of about 4.75 years. After that the savings continue for the life of the improvements, and rebates for the audit or upgrades shorten the payback further.
Frequently asked questions
What does a home energy audit find?
An auditor measures air leakage with a blower-door test, scans for missing insulation and thermal bridges with infrared, checks HVAC and duct performance, and inspects appliances and lighting. The result is a ranked list of fixes with the biggest savings first, so you spend on what pays back fastest.
Is a paid audit worth it over a DIY check?
A do-it-yourself walkthrough catches obvious drafts and old bulbs, but a professional audit's blower-door and infrared tools reveal hidden leaks and insulation gaps you cannot see. For homes with high bills or comfort problems, the paid audit usually more than pays for itself by targeting the right fixes.
Are audits free or subsidized?
Many utilities offer free or heavily discounted home energy assessments, and federal tax credits now cover a share of professional audit costs. Check your utility and enter the net price you actually pay so the payback here is accurate.
How much can the fixes save overall?
Comprehensive improvements found in an audit commonly cut total home energy use by 15 to 30%, with leaky older homes at the higher end. The exact figure depends on your home's current condition and how many recommendations you complete.