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Earnings and quality

Related-party transactions

Also known as: related party transactions, affiliated transactions, non-arm’s-length transactions

Definition

Related-party transactions are dealings between the company and people or businesses connected to it, such as the owner, family members or companies they control. Diligence tests whether the terms were at market rates and whether they will continue after the sale.

Updated November 2026

Related-party transactions, explained simply

Where the owner leases the premises to the company through a separate property entity, the rent may reflect convenience rather than market value. After the sale the arrangement will normally be repriced, and EBITDA is adjusted to reflect the real cost.

Related-party items can also create obligations that surface only after closing, such as loans to or from the owner or guarantees.

Rent paid to the owner against market rent

Illustrative

Alder Creek Manufacturing, $ thousands per year

The $150,000 shortfall reduces EBITDA by $0.15 million, equivalent to $1.2 million of value at 8.0x.

Common related-party transactions

TransactionWhat diligence checks
Rent paid to the owner’s property companyIs it at market rent, and will the lease continue?
Family members on payrollAre they working, and at market pay?
Sales to or purchases from owner-controlled businessesAre prices at market rates?
Loans to or from the ownerMust they be repaid at closing?
Shared services with another owner businessWill they continue, and at what cost?

Worked example

Alder Creek pays $100,000 a year of rent to a property company owned by the seller. A market rent for the building is $250,000, and after the sale the seller will charge market rent. Diligence reduces EBITDA by $0.15 million, which is $1.2 million of value at 8.0x.

Alder Creek Manufacturing, Inc. is a fictional company. All figures are illustrative.

Why it matters in a deal

Related-party terms can quietly raise or lower profit, and can leave costs or obligations that appear only after closing.

Red flags

  • Related-party arrangements with no written contract
  • Sales to related companies at above-market prices that inflate revenue
  • Owner loans not recorded in the books

Frequently asked questions

What are related-party transactions in M&A?
Related-party transactions are dealings between the company and people or businesses connected to it, such as the owner, family members or companies they control. Diligence tests whether the terms were at market rates and whether they will continue after the sale.
Do accounting rules require disclosure?
Yes. US GAAP (ASC 850) requires material related-party transactions to be disclosed.
Are related-party transactions always adjusted?
Only where terms are not at market rates or will change after the sale.

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