The verdict in three sentences
The three quotes a London SME typically receives, £100, £250 and £600 a month, do not cover the same service at all, even though they all say "WordPress maintenance". The real difference is in the guaranteed response time, tested daily off-site backups and included development hours. For a brochure site that generates leads, the £250 plan is usually the right balance, because a single hack costs £2,200 to £5,200 to clean up.
What lies behind three very different quotes
A business WordPress site runs around twenty plugins on average. With 25 plugins, you get several updates a week, some of which patch actively exploited vulnerabilities. The £100 plan often applies those updates automatically without testing, which works until the day an update breaks the contact form for a week and nobody notices.
| Service | £100/month plan | £250/month plan | £600/month plan |
|---|---|---|---|
| Updates for 25 plugins | Automatic, untested | Weekly, tested on staging | Weekly, tested, with report |
| Backups | Weekly, on the same server | Daily, off-site | Daily off-site, restore tested monthly |
| Uptime monitoring | No | Every 5 min | Every 1 min, SMS alert |
| Guaranteed response time | 48 business hours | 8 business hours | 4 h, including weekends |
| Small changes included | 0 h | 1 h per month | 3 h per month |
| Post-hack cleanup | Billed at £85/h | Included once a year | Included, unlimited |
| Monthly report | No | Yes, summary | Yes, with performance and SEO |
What a hacked or broken site really costs
The relevant comparison is not £100 versus £250 a month. It is the annual cost of the plan against the probable cost of an incident. London SMEs hit in 2026 by spam injections or malicious redirects report direct costs of £2,200 to £5,200, not counting the loss of Google rankings that can last several weeks.
| Incident type | Estimated direct cost | Typical downtime without a retainer | With £250 plan |
|---|---|---|---|
| Update breaks the contact form | £250 to £1,000 in lost leads | 5 to 15 days | Under 1 day |
| SEO spam injection | £1,300 to £3,000 | 2 to 6 weeks of Google penalty | Cleanup within 8 h |
| Defaced or ransomed site | £2,200 to £5,200 | 3 to 10 days | Restore within 8 h |
| Expired SSL certificate | £150 to £700 | 1 to 3 days | Monitored renewal |
| Corrupted database with no backup | £3,500 to £7,000 (rebuild) | 2 to 4 weeks | Restore from the previous day |
With an annual probability of a serious incident around 15 to 25% for a poorly maintained WordPress site, the average cost of risk sits around £500 to £1,300 a year. The mid-tier plan costs £3,000 a year and includes 12 hours of development, worth about £1,020 on their own at typical hourly rates.
Clauses to check before signing
A serious maintenance contract spells out what is covered. Check five points: whether response time is in business or calendar hours, where backups are stored and for how long (30 days minimum), whether unused development hours roll over, who owns the admin access and domain name, and the commitment period. Be wary of 36-month contracts without an exit clause: 12 months rolling to monthly is the reasonable norm in 2026.
Mini case study
James, managing director of an 18-person joinery firm in London, receives 25 quote requests a month through his site, 20% of which turn into jobs averaging £5,200. A week with a broken form costs him about 6 requests, so 1.2 jobs and £6,240 in revenue.
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He compares: the £100 plan, £1,200 a year, with 48 h response and untested updates; the £250 plan, £3,000 a year, with 8 h response and 12 hours of development included. He uses those 12 hours to add project case studies, which would have cost £1,020 separately. Net cost of the mid-tier plan: £1,980 a year, £780 more than the entry plan, less than the revenue lost in a single day of a broken form at peak season.
FAQ
What is the average price of WordPress maintenance in London in 2026?
Retainers range from £100 to £600 a month. For an SME with an active brochure site, £200 to £300 a month is the most common service level.
Are automatic updates enough?
For a personal blog, sometimes. For a business site with 25 plugins, an untested update can break a key page; staging tests add about 30 minutes a week.
Where should backups be stored?
On storage separate from the server, ideally in the UK or EU, kept for at least 30 days. A backup on the same server disappears with it if the site is hacked.
What happens if I don't use my development hours?
It depends on the contract: some roll hours over for 3 months, others lose them monthly. Get this clarified in writing.
Can I switch provider mid-contract?
Yes if the contract includes a notice period, usually 1 to 3 months. Insist that admin access, hosting and the domain name stay in your name.
Let's scope your project. Free audit of your WordPress site and a matching retainer from £100 to £600 a month, set up in 5 days. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
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.
