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Profit centers for sole proprietors: see which part of your business actually makes money

Most self-employed people have several income streams: the hair salon also sells products, the agency does web design and ads, the photographer shoots and teaches. At the end of the year you know how much you earned in total — but not what you earned it with. That changes now: with profit centers, einzly shows you revenue, expenses and result for every area of your business — assigned automatically.

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einzly Editorial
Tax & finance editorial · einzly
7 min read
19 Aug 2026
Related topics
Profit centersSegment reportingReports

01What are profit centers?

A profit center is an area of your business that you look at like a small company of its own: with its own revenue, its own expenses and its own result. In classic accounting this is called segment reporting — fiduciaries often maintain it by hand in Excel. In einzly it's built in and fills itself.

For each profit center you see at a glance:

  • Result (revenue minus expenses) with margin in percent
  • Monthly trend as colored stacked bars — which area carries, which one drains
  • Each area's share of total revenue
  • Comparison with the previous year or period
  • Number of bookings and average amount — big projects or volume business?


02Assigned automatically — almost no manual work

A report is only as good as its assignments. That's why einzly does the work for you wherever the assignment is unambiguous:

  • Services from your catalog carry their profit center automatically into every quote and invoice — assign once, never think about it again
  • Free-text positions use the invoice's profit center
  • einzly remembers the profit center per supplier — including splits like 60/40 for rent
  • Stripe, SumUp, wallee, Shopify and Mollie: every connection gets a default profit center — imported payments and fees are assigned automatically
  • A safety net when recording: if the assignment is missing, einzly asks once — forgetting is impossible
  • Anything that can't be assigned lands visibly in the “Unassigned” inbox — and can be assigned there in bulk
No guessing gameseinzly only assigns what is unambiguous — via your catalog, your defaults and your supplier memory. There is no automatic text recognition silently filing things wrong. Better an honest “Unassigned” than a wrong booking.


03How to set up profit centers

Profit centers are part of the Pro plan (included in the trial) and completely optional: if you don't activate them, nothing in einzly changes. Setup takes about two minutes:

1
Open profit centers

Click “Profit centers” in the navigation. The setup assistant guides you through four steps.

2
Define your areas

Pick an industry template (agency, hospitality, trades, consulting, retail, photography) or create your own profit centers with name, color and icon. We recommend 2 to 6. The “General” profit center for overhead is added automatically.

3
Assign services

Assign your catalog services to a profit center once. From then on, every quote and invoice sorts itself.

4
Activate

After activation the profit center field appears in revenue, expenses and invoices — and your report comes to life.


04Distributing overhead fairly

Rent, insurance or software don't belong to any single area — they belong to all of them. Simply book such costs to the “General” profit center. The results table then offers an “Allocate overhead” switch: it distributes the general expenses to the other profit centers by revenue share — whoever generates 60 percent of revenue carries 60 percent of the overhead. This only happens in the report; your bookings remain unchanged.

For precision: percentage splitsYou can split individual expenses across several profit centers by percentage — for example rent 60/40 between salon and shop. einzly calculates to the cent and remembers the split for next time.


05Frequently asked questions

Profit centers are included in the Pro plan — and in the trial, which always has the full Pro scope. The feature is opt-in: if you don't activate it, nothing in einzly changes.
Projects handle individual engagements: time tracking, expenses, billing. Profit centers are a permanent result view per business area — they answer the question which part of your business is worth it.
Nothing automatically — einzly never assigns retroactively on its own. Existing bookings appear in the “Unassigned” inbox and can be assigned to a profit center in bulk.
No. Profit centers are purely internal — they never appear on PDFs, quotes or invoices for your clients.
Yes, anytime. Your assignments stay saved — the fields and the report are just hidden. One click brings everything back.
Yes — exactly that. What fiduciaries otherwise maintain by hand in Excel, einzly does automatically: revenue and expenses per segment, result, overhead allocation. Also handy for associations that want to evaluate their departments separately.
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