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BuyingExpert answer · 1 min read

Will a marketing agency’s retainer clients stay after I buy it?

Retainer clients can leave, so no one can promise they will stay. Read each retainer’s renewal and notice history, learn who the client’s day-to-day contact is, meet the top clients with the seller, keep the account leads in place, and plan the first renewal cycle after closing before you sign.

A marketing agency’s monthly retainers look steady, but whether a client can leave on short notice depends on each contract. What holds them in place is the relationship and the results the client sees. When you buy the agency, those relationships are being handed to someone new. A careful buyer tests how firm they are before closing, and plans the handover as carefully as the purchase.

Read the renewal and notice history

For each retainer, ask when it started, how often it renewed, whether the scope changed and what notice the client may give. Ask for any notice already given or hinted at. A client that has renewed several times without fuss is different from one that has been renegotiating. Your lawyer can tell you what each contract allows.

Learn who the client really deals with

The person who signed the contract is often not the person who deals with the agency each week. Ask who that contact is on both sides, and who at the agency the client trusts. If a relationship rests on the owner or one account lead, you have learned something important about what you are buying.

Meet the top clients with the seller

With the seller’s agreement, ask to meet the largest clients before or just after closing, with the seller present. Ask what they value and what would make them reconsider. Clients often say more to a buyer who asks directly than the seller expects. This answer on selling when clients hire the agency for the owner’s own work explains the seller’s side.

Keep the leads and plan the first renewal

Talk to the account leads about their role before closing, and agree what stays the same. Then mark the first renewal date for every client on a calendar and plan the contact beforehand. Sharing a short review of results before the date is one way to prepare.

Sources

This answer is checked against primary sources. Links were last confirmed on the dates shown.

  1. 01
    Business Development Bank of CanadaGovernment
    How to conduct due diligence when buying a business
    bdc.ca·Checked Oct 21, 2026
  2. 02
    Business Development Bank of CanadaGovernment
    What are the steps to buying a business?
    bdc.ca·Checked Oct 21, 2026
  3. 03
    Business Development Bank of CanadaGovernment
    Major pitfalls to avoid when negotiating a purchase agreement
    bdc.ca·Checked Oct 21, 2026
  4. 04
    Canada Revenue AgencyGovernment
    Buying a business
    canada.ca·Checked Oct 24, 2026

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