Water well drilling services, including borewell and tube well drilling, are treated as civil engineering or works contract services under GST. Earlier, different ways of billing drilling, casing and pump supply sometimes led to different effective tax outcomes for similar well projects, which complicated costing and tax planning for both contractors and clients.
After the September 2025 rationalisation, most water well drilling services under SAC 995435 generally fall in the 18 percent slab with
input tax credit
. This standard rate applies where drilling and basic casing are provided as a service, unless a specific notification gives concessional treatment for a particular rural or social sector scheme.
The table below shows the latest standard GST rate for SAC code 995435.