WordPress to Next.js migration for a New York consulting firm: budget and SEO risk (2026)

The verdict in three sentences

For a New York consulting firm with 80 to 300 pages, a WordPress to Next.js migration with a headless CMS costs USD 25,000 to 60,000 and takes 8 to 14 weeks. The SEO risk is real but manageable: with an exhaustive 301 redirect plan and pre-launch QA, the temporary traffic dip stays within 0 to 15% and recovers in 6 to 10 weeks. The main gain is security: no more vulnerable plugins publicly exposed and a drastically smaller attack surface, which matters for a firm handling sensitive client information.

Why a consulting firm leaves WordPress in 2026

WordPress is great for getting started, but a firm's site quickly piles up 25 to 40 plugins, a page builder and poorly maintained premium themes. Two breaches in three years is a clear signal: each intrusion costs cleanup (USD 2,500 to 7,000), lost trust and sometimes breach notifications under New York's SHIELD Act if form data leaked.

Detailed migration budget

These are 2026 ballpark figures for a specialised agency in New York. The main variable is content complexity: insights, case studies, consultant profiles, gated white papers.

The five safeguards that protect your traffic

First, a complete URL inventory: Search Console export, sitemap, server logs and backlinks, so no page receiving traffic or links is missed. Second, a one-to-one mapping from old to new URLs, tested automatically before go-live. Third, keeping the title tags, meta descriptions and structured data of the pages that perform. Fourth, switching over on a Tuesday or Wednesday, never before a holiday, and submitting the new sitemap the same day. Fifth, daily monitoring of 404 errors and indexing for 30 days.

Migrations that lose 30 to 50% of traffic have almost always skipped one of these steps, most often redirects for old insights and PDFs.

Mini case study

Rachel Stein, partner at a 35-consultant strategy firm in Manhattan, leads the rebuild. The site has 180 pages and generates 25 qualified inquiries a month, 2 of which become engagements averaging USD 65,000. Migration budget: USD 40,000, Sanity CMS at USD 99 a month. Conservative assumption: 10% less traffic for 2 months, about 0.4 engagements delayed. In return, maintenance drops from USD 7,500 to 3,500 a year, LCP from 3.9 to 1.6 s, and hacking risk nearly disappears. If better performance adds only 2 qualified inquiries a month, roughly 2 extra engagements a year, the project pays back in under 12 months.

FAQ

Can we keep the same URLs? Yes, and it is recommended when the structure is clean. Redirect volume then drops and the traffic dip tends toward 0%.

Will editors need to learn a new tool? Yes, but 2 to 3 hours of training is usually enough. Modern headless CMSs offer live preview comparable to WordPress.

Which headless CMS should we pick? Sanity or Payload for flexibility, Strapi for self-hosting. Cost ranges from USD 0 (self-hosted) to 450 a month for a large editorial team.

How long to recover previous traffic? On a well-prepared migration, 6 to 10 weeks. Projects we track often show 10 to 25% more traffic after 6 months thanks to speed.

What about forms and privacy compliance? Forms go through an API with consent logging. Allow USD 800 to 2,500 if a CRM such as HubSpot or Salesforce must be connected.

Let's scope your project. Share your site URL and page count and we will cost the migration (USD 25,000 to 60,000 depending on scope, 8 to 14 weeks) including the redirect plan. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.