Noida's non-metro HRA classification often surprises Delhi-region workers. Greater Noida and the broader NCR are geographically contiguous with Delhi, but the IT Act's metro list applies at the city level — and Noida is in UP, not Delhi. The 40% basic cap on HRA exemption applies. For an IT employee renting in Sector 62 at ₹30,000 a month on a ₹62,500 monthly basic, exemption is capped at ₹3,00,000 a year, against ₹3,75,000 a same-salary employee in Delhi would claim.

UP's absence from the PT-collecting states is part of the broad north-Indian pattern. UP, Haryana, Delhi, Punjab, Rajasthan, MP, Bihar, and J&K all skip Professional Tax. For Noida employees commuting in from Delhi or Gurgaon, the tax footprint is identical regardless of which side of the state border they reside on — no PT in any of the three. The major contrast is between this northern cluster and the Mumbai-Bangalore-Chennai axis where PT is collected at or near the constitutional ₹2,500/year ceiling.

The Noida-specific consideration for cross-state commuters is straightforward: if you live in Delhi and work in Noida, HRA exemption uses Delhi's 50% metro cap (Delhi is your residence). If you live in Noida and work in Delhi, HRA uses Noida's 40% non-metro cap. Many BPO and tech employees in their twenties live in Sector 18 or Indirapuram for proximity to Noida offices; senior employees often retain Delhi residences and commute. The HRA math meaningfully favours the latter — for a ₹15 lakh CTC, the gap is roughly ₹15,000 of additional annual income tax under the old regime.