Valuation
What makes a formal valuation more credible than an online calculator?
Where a formal valuation's credibility comes from, what an online calculator leaves out, and when you actually need the formal version.
By Michael D. Rubin, CEO & Founder · September 2026 · 892 words
A formal valuation is more credible because a qualified person has examined your actual records, adjusted them to show true earnings, applied recognized methods to evidence from comparable transactions, and written down every assumption so someone else can check it. An online calculator does none of that. It multiplies a few numbers you type in by an average.
That does not make calculators useless. It makes them a starting point, not something a lender, a partner, a court or a buyer will rely on.
What an online calculator actually does
Most calculators ask for revenue, profit and industry, then apply a multiple drawn from a general average. They take your profit figure at face value, cannot tell a one-time expense from a recurring one, and know nothing about your customers, your team, your equipment or your lease.
Two companies with the same profit can deserve very different prices. One has long-term customers, a strong manager and clean books; the other depends on the owner and one large account. A calculator gives them the same answer, and both owners walk away with a number that is wrong in a different direction.
Calculators are still worth a few minutes. They show the rough scale of value, they help an owner decide whether a sale is even worth thinking about, and they make it clear that profit, not revenue, drives price. The danger is treating the result as a figure to plan around, quote to a partner or measure an offer against. Owners who anchor on a calculator number tend either to reject a fair offer or to accept a low one.
Where the credibility comes from
| Element | Online calculator | Formal valuation |
|---|---|---|
| Source data | Numbers you type in | Tax returns, financial statements and supporting records |
| Earnings adjustments | None | Owner pay set to market; personal and one-time costs identified and supported |
| Method | One average multiple | Market, income and asset approaches weighed against each other |
| Company-specific risk | Ignored | Customer concentration, owner dependence, margins and growth assessed |
| Documentation | A number on a screen | A written report stating every assumption and source |
| Who stands behind it | No one | A named professional who can explain and defend it |
Why the earnings adjustments matter most
The biggest difference is normalization: restating your earnings the way a buyer or lender would see them. Owners of private companies often run personal expenses through the business, pay themselves above or below a market wage, or have a one-time cost in a given year. A formal valuation adds back or deducts each of those items, with support, to arrive at adjusted EBITDA (earnings before interest, taxes, depreciation and amortization, after those adjustments).
That adjusted figure can be very different from the profit on your tax return. A multiple applied to the wrong earnings gives a wrong answer no matter how carefully the multiple was chosen. Only then does the analyst apply the methods: a market approach based on what buyers pay for comparable companies, an income approach based on expected future cash flow, and an asset approach as a floor. The piece on what is my business worth explains those drivers in more depth.
When you need the formal version
You do not need a formal valuation to decide whether selling is worth exploring. You usually do need one when a third party must rely on the number, as in the situations listed here.
In those situations the person relying on the report is not you, and they need to see how the number was reached. Ask whoever prepares it what standard of value they are using, what credentials they hold, and whether the report will be accepted by the lender, court or advisor who asked for it. A report that is not fit for its purpose costs money twice.
- Buying out a partner, or setting the price formula in a buy-sell agreement
- Estate and gift planning, where your CPA or estate attorney will say what standard the report must meet
- Bank financing, where the lender may require an independent valuation
- A divorce or a shareholder dispute
- Bringing in an investor or setting up an employee ownership arrangement
What even a formal valuation cannot tell you
A well-built valuation estimates fair market value. It is not a sale price. The price in an actual sale is set by buyers competing for the company, and their offers also differ in structure: cash at closing, earnouts, seller notes and escrow. A strong, competitive process can finish above an appraiser's figure; a weak one with a single buyer can finish below it.
That is why owners who plan to sell use a valuation to set expectations and a competitive sale process to set the price. The two answer different questions.
Where MDR & Associates fits
We offer a formal third-party business valuation as a separate, optional service with its own price, for owners who need a documented report for a lender, partner or estate plan. For owners deciding whether to sell, the free, confidential discovery meeting and opinion of value is usually the right first step: we review three years of your financials and give you a low-to-high range with the reasoning behind it. If you want a quick sense of scale before either, start with the free valuation snapshot, and treat it the way you would treat any calculator, as a first look rather than an answer.
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