How many internal links is too many on a single page?
More than 5 in-body internal links on a ranking page is too many. Past that, each link dilutes the PageRank passed to every destination, and the pattern starts signaling manipulation to Google.
The math of dilution
PageRank from a source page is split across its outbound links. 10 links means each destination gets ~10% of the passable authority. 20 links drops that to 5%. Concentrating the budget on fewer destinations gives each one a bigger push.
The manipulation signal
Google's algorithm penalizes pages with excessive keyword-stuffed outbound links. Automatic plugins that drop 50+ exact-match anchors produce an easy-to-detect footprint. Manual anchors under a 5-per-page cap stay well clear.
Nav and footer don't count
Navigation and footer links are site-wide and heavily discounted. The 5-link cap only applies to in-body contextual links inside articles, guides, and landing pages.
Internal Linking Agent never suggests more than 5 in-body links per source page — the cap is enforced in the suggestion pipeline itself.