The verdict in three sentences
This worked example follows a fictional company of 90 staff in Rotterdam, representative of the sector, that invests 48,000 EUR over one year in SEO to rely less on personal networks and closed tenders. Within 12 months, its qualified enquiries rise from 2 to 11 a month, with 9 service keywords on page one by month ten. One contract won through the site is worth more than 5x the annual spend, which shows SEO pays in a high ticket sector, provided you accept a 6 to 10 month lead time.
The starting point
The company, which we will call 'Maas Industrial Services' for this example, earns most of its revenue from a handful of refinery and chemical plant operators in Botlek, Europoort and Pernis, plus some terminal operators in the port. Work arrives through relationships and invitation only tenders. Its six year old website has 5 Dutch pages, no English pages and ranks for nothing useful. Procurement teams at international operators and EPC contractors, who often search in English, never find it when they look for 'industrial maintenance contractor Rotterdam' or 'pump and compressor maintenance Botlek'.
The budget and what it paid for
| Line item | Amount | Detail |
|---|---|---|
| Initial audit | 6,000 EUR | Technical, competitors, 30 keywords researched |
| Monthly SEO support | 3,500 EUR × 12 = 42,000 EUR | Writing, technical work, links, weekly report |
| Dutch service pages | 9 pages | Pump maintenance, mechanical works, inspection, E and I services |
| English service pages | 9 pages | Same services, written for international buyers |
| Safety and certification pages | Included | VCA and VCA Petrochemie, ISO 45001, workforce qualifications |
| Total over 12 months | 48,000 EUR |
The 18 service pages were written with the company's engineers: each describes the service, the equipment covered, the crews and sector references, with a request for quote form. Safety pages matter more than anything else here. Petrochemical clients in the port expect contractors to hold VCA certification, and buyers check it before shortlisting, so the pages state which certifications the company holds and link to the certifying bodies rather than paraphrasing the standards.
Month by month
| Period | Pages live | Keywords on page one | Qualified enquiries a month | Note |
|---|---|---|---|---|
| Month 0 (before) | 5 | 0 | 2 | Network referrals only |
| Month 3 | 10 | 1 | 2 | Technical fixes, first pages |
| Month 6 | 18 | 4 | 5 | English pages indexed |
| Month 8 | 18 | 6 | 7 | First enquiries from international EPC contractors |
| Month 10 | 18 | 9 | 9 | Stable rankings on key terms |
| Month 12 | 18 | 9 | 11 | Steady flow, about 60% in English |
Qualified enquiries mean an identified company with a defined need, excluding job applications and sales pitches. The jump from 2 to 11 a month comes mostly from the English pages, which reach procurement teams at international operators and contractors working in the port.
Return on investment
| Indicator | Before SEO | After 12 months |
|---|---|---|
| Qualified enquiries a month | 2 | 11 |
| Share of enquiries in English | 0% | 60% |
| Quotes issued over the year | 20 | 64 |
| Contracts signed from the site | 0 | 4 |
| Largest contract | Not applicable | Annual maintenance worth 260,000 EUR |
| Largest contract versus investment | Not applicable | 5.4x |
The main contract, annual maintenance of pumps and compressors for a tank terminal operator, is worth 260,000 EUR, or 5.4x the 48,000 EUR invested. Three smaller contracts add to that result.
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Illustrative example: the commercial director of this fictional firm calculates net profitability. On the 260,000 EUR main contract, net margin is about 15%, or 39,000 EUR. The three other contracts total 90,000 EUR of revenue, 13,500 EUR of margin at the same rate. Total margin reaches 52,500 EUR against 48,000 EUR invested, a net gain of 4,500 EUR in year one, while maintenance contracts typically renew and the enquiry flow continues into year two.
FAQ
What SEO budget suits an industrial services firm in Rotterdam in 2026?
In this example, 3,500 EUR a month plus a 6,000 EUR audit, 48,000 EUR over a year. The 2026 market ballpark generally runs from 2,000 to 6,000 EUR a month depending on page volume.
Why English pages for a Dutch firm?
Because many procurement teams at international operators and EPC contractors in the port search in English. In this example, about 60% of month 12 enquiries came through the 9 English pages.
How long until the first contract?
First enquiries from international contractors arrived in month 8, the main contract in month 11. Plan for 6 to 10 months in a sector with long buying cycles.
Is this a real client?
No, it is a fictional company representative of the sector, built to illustrate realistic orders of magnitude. Real results vary with competition, the starting state of the site and the quality of the 18 pages.
Which pages come first?
The highest margin services and the safety and certification pages. In this example, 9 services in two languages were enough to put 9 keywords on page one.
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Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
