A PBN domain doesn't have a fixed expiration date. It stays valid until Google or other engines identify it as part of a manipulative network and devalue or deindex it. Well-maintained PBN domains can last 3-5 years or longer, while poorly managed ones get burned out in 6-12 months. The lifespan hinges on operational security. Domains sharing the same hosting IP block, registrar patterns, identical GA codes, or templated designs get flagged faster. If you're linking the same 15 PBN domains to every money site you launch, Google's graph analysis will connect the dots within a year. Diverse hosting, unique content, varied CMS installations, and natural link velocity extend longevity. Rotating which PBNs link to which money sites also helps. Metrics decay matters too. A PBN domain with DR 45 today might drop to DR 28 in two years if you're not maintaining its own inbound links or if its original backlink sources disappear. Domains that relied heavily on expired editorial links often see steep drops once those publications update their CMSs or clean up dead pages. You need to periodically audit whether the domain still holds the authority you paid for. At Ottawa SEO, we've seen clients inherit PBNs from previous agencies that were already半-burned—indexed but with manual actions pending or algorithmic suppression already applied. The smart move is treating each PBN domain as a depreciating asset with a 24-36 month realistic window, then replacing or retiring it before it becomes a liability. If you're building your own network in 2025, assume you'll need to refresh 20-30% of your domains every two years. That's the maintenance cost nobody mentions when they sell PBN services at $150/month. The question isn't if a PBN domain expires, but whether you'll catch the decline before it tanks your money site's rankings.