Business Valuation Calculator

1. Enter your financial numbers. Pull these from your most recent tax return or profit and loss statement. Use annual figures. Net profit is the bottom line after all expenses, including your salary.

2. Add owner compensation and add-backs. Include your total salary, benefits (health insurance, vehicle, phone), any one-time expenses that will not recur, depreciation, and interest. These get added back to net profit to calculate SDE.

3. Select your business factors. Be honest about where your business stands. Each factor shifts the valuation multiple up or down. Maintenance agreements and owner dependence have the largest impact on value.

4. Review the estimated value range. The calculator shows a low, mid, and high estimate. Most deals close near the midpoint, but strong negotiators with well-documented businesses can push toward the high end.

5. Test different scenarios. Change the inputs to see what drives value. If you are planning to sell in 2-3 years, focus on the factors you can improve: build up maintenance agreements, reduce owner dependence, and clean up your books.

The SDE multiple method is the standard for valuing owner-operated HVAC companies. SDE (Seller's Discretionary Earnings) represents the total economic benefit available to a single owner. It starts with net profit and adds back the owner's salary, benefits, one-time expenses, depreciation, and interest. This gives buyers a clear picture of what they can expect to earn.

Here is how this calculator computes the valuation:

Multiples increase with revenue size because larger businesses carry less risk, have more infrastructure, and are more attractive to a wider pool of buyers. A $500K company might trade at 2.75x SDE while a $5M company could command 4.25x or higher.

Maintenance agreements are the biggest value driver. They represent predictable, recurring revenue that transfers to a new owner on day one. A business with 50%+ of revenue from service contracts can see its multiple jump by a full point compared to one that relies entirely on project work and one-time calls. If you are building to sell, growing your maintenance base is the single highest-leverage move.

Owner dependence is the biggest value killer. If you are personally selling half the jobs and managing every install, a buyer sees risk. Businesses that run with a full-time manager or are mostly passive command higher multiples because the revenue does not walk out the door with the seller.

Thinking of selling. If you are considering an exit in the next 1-5 years, run your numbers now to get a baseline. Then focus on the adjustable factors: build maintenance agreements, hire a manager, invest in NATE certifications, and get your books clean with a CPA. Each improvement can add tens or hundreds of thousands to the sale price.

Buying a business. Before you make an offer on an HVAC company, run the seller's numbers through this calculator. Compare the asking price to the estimated range. If the seller wants more than the high estimate, you need to understand what justifies the premium. If the asking price is below the midpoint, dig into why and find out what the seller is not telling you.

Succession planning. Whether you are passing the business to a family member, selling to a key employee, or planning an ESOP, you need a defensible valuation. This calculator gives you a starting framework. For an actual transaction, hire a business broker or certified valuation analyst, but use this tool to make sure you are in the right ballpark and understand what drives the number.