A ₹5,000 to ₹25,000 freelancer typically gives you light on-page tweaks, two or three blog posts a month, and a handful of cold-email link requests. It is enough to keep your site from rotting but rarely enough to outrank a competitor doing the same things at scale.
₹25,000 to ₹75,000 buys you a small agency or a senior solo operator — the band where I'd place most service businesses. You get a real strategy, four to eight content pieces a month, ongoing technical fixes, Google Business Profile management, and a serious attempt at link building. This is where SEO starts compounding instead of just maintaining.
₹75,000 to ₹3,00,000 is enterprise SEO: dedicated account leads, in-house content teams, paid tooling (Ahrefs, Screaming Frog, Surfer), aggressive link acquisition, full technical re-architecting. You need to be in a competitive vertical, going national, or fighting well-funded incumbents for this to pay back. For a single-city service business, it's overkill.