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Due diligenceExpert answer · 1 min read

How do I check whether a print shop’s outsourced jobs hide margin problems?

Separate outsourced work from jobs printed in-house, then compare each supplier invoice with what the customer paid. Check whether the shop adds a markup, absorbs rush charges or discounts to keep clients. Thin or negative margins on outsourced jobs can be hidden inside a healthy overall result.

Ask for a list of every job sent to an outside supplier over a recent period, with the supplier’s charge and the shop’s invoice side by side. Work out the gap for each one. Look at the biggest customers separately, since a shop may quietly keep a large account by passing work through at little profit.

Then ask why the work goes out. Is it a machine the shop does not have, a capacity limit or a habit? If a supplier is a single point of dependence, ask how long the relationship has lasted and whether prices are agreed in writing. A supplier that raises prices could squeeze margins quickly. Include freight, rework and supplier delays in the margin for every outsourced job. The aim is a true picture of what each job earned, so that you can decide how much of the shop’s success rests on partners.

Finally, check how the owner records these jobs. Freight, rework, spoilage and late penalties from suppliers are easy to leave out. Your accountant can rebuild margins by job type and show whether the in-house work is carrying the outsourced work.

Key takeaways

  • Compare each supplier invoice with the customer’s invoice, job by job.
  • Look at big accounts separately, as they may hide thin margins.
  • Ask whether supplier prices are agreed in writing and how long they last.
  • Include freight, rework and supplier delays in the margin for every outsourced job.

Sources

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

  1. 01
    Business Development Bank of CanadaGovernment
    What is the operating profit margin?
    bdc.ca·Checked Oct 25, 2026
  2. 02
    Business Development Bank of CanadaGovernment
    How to conduct due diligence when buying a business
    bdc.ca·Checked Oct 21, 2026

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