How access actually works
Unlike every other hub in this section, Target Plus has no public self-serve application. Sellers are typically identified and invited by Target's merchandising team, often after building a track record on other marketplaces, and access frequently runs through a short list of Target-approved marketplace-integration partners rather than a direct portal signup. Any resource that implies a normal "apply here" flow for Target Plus is describing something that, as of this writing, does not exist — we'd rather tell you that plainly than send you looking for a form.
Readiness signals worth building toward
Based on how sellers report reaching Target Plus, the readiness signals that seem to matter most are: a strong seller performance history on other marketplaces (few defects, strong reviews, reliable fast shipping), a clean and complete product catalog, and clear brand differentiation that fits gaps in Target's own assortment strategy. None of these guarantee an invitation, but they're the closest thing to a controllable checklist.
Operating model once accepted
Once approved, integration is typically handled via an approved partner or EDI-style connection rather than a fully self-serve seller dashboard experience comparable to Amazon or Walmart. Fulfillment, returns, and performance expectations are modeled closely on Target's own retail operating standards.
What we'd recommend instead, in the meantime
If Target Plus isn't currently reachable for your business, the more productive near-term path is usually building a strong track record on Amazon and/or Walmart Marketplace first — see Best Marketplaces to Sell On — both because that's a plausible on-ramp and because it's a channel you can actually control the application for today.
Sources
Secondary sources on the Target Plus access model (see this site's central Sources & Verification page). Target does not publish a first-party public page describing a self-serve application process, which is itself the fact being reported here.