Waterproofing services, including terrace, basement and roof waterproofing, are treated as works contract or building completion services under GST. Earlier, different ways of splitting labour and material or clubbing waterproofing with other finishing work sometimes produced different effective tax outcomes for similar jobs, which caused confusion for contractors and clients.
After the September 2025 rationalisation, most waterproofing and related building protection services under SAC 995453 generally come under the 18 percent slab with input tax credit. This standard rate applies to independent waterproofing contracts and packages unless a specific notification provides concessional treatment for a particular public or social scheme.
The table below gives the latest GST rate for services under SAC code 995453.