What is a roll-up? Definition, formula and example

This is for operators who are thinking about buying more than one business, and for investors who have been offered a share of one. By the end you will know what a roll-up is, the formula behind it, what an illustrative three-company roll-up looks like on paper, and where the idea breaks.

The definition in plain words

A roll-up means buying several small businesses in the same industry and running them as one company. A buyer might purchase five plumbing firms in one state, put them on one booking system and one brand, and sell the group years later as a single regional business.

A roll-up is one kind of acquisition strategy; Investopedia's M&A explainer covers the wider family. The aim is a larger company with lower costs and more market presence. The first business bought is often called the platform; the later ones are add-ons.

Private equity firms have done this for decades in dentistry, veterinary care, HVAC, landscaping, accounting and agencies. Smaller operators now do it too, often with SBA loans, seller notes and investor money. Moran Pober built and sold Rollups.com and today works with operators running AI-powered roll-ups, which is why this site covers the subject in detail.

The formula

The idea rests on one comparison:

Value created = (combined EBITDA × exit multiple) − (sum of the entry prices)

Small businesses sell for low multiples of profit, often 3x to 5x, because they depend on the owner and have few systems. Larger businesses with management teams and steady numbers sell for higher multiples. If you can buy at low multiples and sell the combined group at a higher one, the gap is the gain. That gap has its own name, multiple arbitrage.

Two more things add to the value. Shared costs: one bookkeeper, one marketing budget, one software stack across all the businesses. And growth: a bigger company can win contracts the small ones could not.

The formula also shows the risk. If the exit multiple is not higher than the entry multiple, or the combined EBITDA falls during integration, the value created can be zero or negative.

Illustrative example: three acquisitions

Here is an illustrative roll-up of three home-services companies bought at 4x EBITDA and valued together at 7x. The numbers are made up but add up. You can run your own in our roll-up calculator.

Value created = ($1,500,000 × 7.0) − $6,000,000 = $4,500,000. Real deals then subtract deal fees, integration costs, interest on acquisition debt and any profit lost while the businesses are being combined. A realistic plan assumes the exit multiple may be lower than hoped and the costs higher.

Where it shows up in a deal

A roll-up starts like any acquisition: a buy box, a search, due diligence and financing. The difference is that the buy box also asks how each business will fit with the others, and the financing has to cover a series of purchases rather than one. Our guide to doing an AI-powered roll-up walks through the operating side.

Many roll-ups raise money from outside investors to fund the purchases. Raising that money is regulated. In the United States most private raises rely on an exemption such as SEC Rule 506 of Regulation D; the SEC's Rule 506(b) page explains the conditions, and Investor.gov has a plain-English note on private placements. Anyone paid to sell those securities may need to be a registered broker-dealer. Acquisitions.com is an advisory firm, not a broker-dealer, a lender or an investment adviser, and this article explains the strategy; it does not recommend it. Investors can read how these deals are typically structured in our guide to investing in an AI-powered roll-up.

Common mistakes

The most common failure is buying faster than you can integrate. Three businesses on three software systems with three ways of quoting are not one company; they are three companies with one owner and more debt.

The second is paying up. Once sellers know a roll-up is buying in their area, asking prices rise. If entry multiples creep from 4x toward 6x, most of the gain in the formula disappears.

The third is assuming the exit multiple. Buyers of the combined group will pay more only if it has a management team, clean consolidated numbers and real shared systems. Without those, the group is valued like the small businesses it is made of.