---
title: "Septic System Installation Services | Professional Septic System Installation Solutions"
description: "Expert septic system installation services covering compliant, reliable, and high-quality solutions tailored to your needs. SAC Code 995434."
canonical: "https://busy.in/sac-code-995434/"
---

# Septic System Installation under SAC Code 995434

Part of [SAC 9954: Services in building & construction](https://busy.in/sac-code-9954/).

Septic system installation services cover digging, laying and fitting septic tanks, soak pits and related drainage lines at residential, commercial or institutional sites. Service providers handle site marking, excavation, tank placement and basic backfilling. Under GST, this work is classified under SAC 995434. The SAC code and its GST rate decide how much GST is charged and how the value is recorded in GST returns.

## 995434 SAC Code GST rate

Septic system installation services are treated as civil engineering or works contract services under GST. In earlier years, different ways of combining excavation, tank supply and installation sometimes produced different effective tax results for similar installations, which made it difficult for contractors and property owners to keep a consistent tax position.

After the September 2025 changes, most septic system installation jobs under SAC 995434 generally fall in the 18 percent slab with [**input tax credit**](https://busy.in/gst/input-tax-credit/) . This standard rate applies where the contractor supplies labour and related material as part of a works contract, unless a specific notification grants concessional treatment for a particular type of public or social scheme.

**The table below gives the latest GST rate for services under SAC code 995434.**

| SAC code | Description | New GST rate (from 22 Sep 2025) | Old GST rate (till 21 Sep 2025) | Notes |
| --- | --- | --- | --- | --- |
| 995434 | Water well drilling services and septic system installation services | 18% with ITC | 18% with ITC | Water well drilling and septic system installation are site preparation / civil engineering services. Updated SAC wise and construction sector summaries treat these at 18 percent with ITC as standard, with no separate 56th Council line item altering this. |

When issuing invoices for services under SAC 995434, service providers should clearly show the taxable value and 18 percent GST so that eligible clients can claim input tax credit where permitted. The same SAC code and rate should also be used in GSTR 1 and [**GSTR 3B**](https://busy.in/gst/a-guide-to-gstr-3b-what-is-gstr-3b/) while reporting the tax liability on septic system installation services.

## Practical classification guidance

In day to day use, businesses should pick the SAC code that best reflects the main nature of the contract. If the work is more focused on building construction, general infrastructure or routine maintenance, another SAC within 9954 may be more appropriate. Correct SAC selection and GST rate application help reduce future disputes, support a clean input tax credit trail and make GST records easier to justify during audits or departmental checks.

## Conclusion

Septic system installation services under SAC 995434 cover digging, laying and fitting septic tanks, soak pits and related drainage lines at residential, commercial and institutional sites. These services are now generally taxed at 18 percent with input tax credit after the September 2025 changes. Contractors and property owners should confirm that such work is correctly classified under this SAC code, charge the correct [**GST rate**](https://busy.in/gst-rates/) on every invoice and follow the same classification in GST returns. For projects linked to public health or government schemes, it is wise to review the latest GST rules and consult a tax expert.

## Frequently asked questions

### What is SAC code 995434 in GST?

This code covers construction of local sanitation, drainage and waste water systems. It includes septic tanks, soak pits, small sewage lines, manholes, campus drains and simple treatment units that handle waste water at building, colony or small community level.

### Does SAC 995434 cover septic tank and sewer system installation?

Yes. Construction and installation of septic tanks, soak pits, inspection chambers, local sewage lines and small drainage systems usually come under 995434. Larger city wide sewer networks often fit under other water and sewerage infrastructure codes, but smaller local systems can stay here.

### What is the GST rate for services under SAC 995434?

Services under this code generally attract 18% GST. Certain sanitation projects funded by government schemes may get concessional or exempt treatment under specific notifications, but these benefits are limited. In most private or mixed projects, contractors should charge the standard 18% with input tax credit.

### Can rural sanitation and water well projects use SAC 995434?

Rural toilets, basic sanitation structures and local drainage lines can use 995434. Pure drinking water wells or borewells may sometimes be mapped to different codes. Where a project combines local sanitation and minor drainage, this code is often suitable for the contractor’s invoices.

### Is ITC allowed on materials for projects billed under SAC 995434?

Contractors can claim ITC on GST paid for pipes, concrete, manhole covers and fittings used in taxable projects. For the final owner, ITC depends on whether the property is used for business and taxable supplies or is purely residential or charitable with no taxable output.

## Explore more

### Other SAC services under 9954

- [995411: Apartment Construction](https://busy.in/sac-code-995411/)
- [995412: Shelter Construction](https://busy.in/sac-code-995412/)
- [995413: Industrial Building Construction](https://busy.in/sac-code-995413/)
- [995414: Commercial Building Construction](https://busy.in/sac-code-995414/)
- [995415: Non Residential Building](https://busy.in/sac-code-995415/)
- [995416: Church Construction](https://busy.in/sac-code-995416/)
- [995419: Property Maintenance](https://busy.in/sac-code-995419/)
- [995421: Road Construction](https://busy.in/sac-code-995421/)
- [995422: Irrigation Infrastructure](https://busy.in/sac-code-995422/)
- [995423: Pipeline Construction](https://busy.in/sac-code-995423/)
- [995424: Cable Laying](https://busy.in/sac-code-995424/)
- [995425: Industrial Plant Construction](https://busy.in/sac-code-995425/)
- [995426: Power Plant Construction](https://busy.in/sac-code-995426/)
- [995427: Sports Facility Construction](https://busy.in/sac-code-995427/)
- [995428: Dam Construction](https://busy.in/sac-code-995428/)
- [995429: Construction Maintenance](https://busy.in/sac-code-995429/)
- [995431: Structural Demolition](https://busy.in/sac-code-995431/)
- [995432: Site Preparation](https://busy.in/sac-code-995432/)
- [995433: Excavation](https://busy.in/sac-code-995433/)
- [995435: Land Clearing](https://busy.in/sac-code-995435/)
- [995439: Repair](https://busy.in/sac-code-995439/)
- [995441: Prefabricated Buildings](https://busy.in/sac-code-995441/)
- [995442: Prefabricated Structures](https://busy.in/sac-code-995442/)
- [995443: Street Furniture Installation](https://busy.in/sac-code-995443/)
- [995444: Construction Assembly](https://busy.in/sac-code-995444/)
- [995449: Building Alteration](https://busy.in/sac-code-995449/)
- [995451: Pile Driving](https://busy.in/sac-code-995451/)
- [995452: Roof Framing Construction](https://busy.in/sac-code-995452/)
- [995453: Waterproofing](https://busy.in/sac-code-995453/)
- [995454: Concrete](https://busy.in/sac-code-995454/)
- [995455: Structural Steel Erection](https://busy.in/sac-code-995455/)
- [995456: Masonry](https://busy.in/sac-code-995456/)
- [995457: Scaffolding](https://busy.in/sac-code-995457/)
- [995458: Special Trade Construction](https://busy.in/sac-code-995458/)
- [995459: Building Repair And Maintenance](https://busy.in/sac-code-995459/)
- [995461: Electrical Installation](https://busy.in/sac-code-995461/)
- [995462: Water Plumbing](https://busy.in/sac-code-995462/)
- [995463: Hvac Installation](https://busy.in/sac-code-995463/)
- [995464: Gas Fitting Installation](https://busy.in/sac-code-995464/)
- [995465: Insulation](https://busy.in/sac-code-995465/)
- [995466: Lift And Escalator, Elevator Installation](https://busy.in/sac-code-995466/)
- [995468: Installation](https://busy.in/sac-code-995468/)
- [995469: Repair And Maintenance](https://busy.in/sac-code-995469/)
- [995471: Glazing](https://busy.in/sac-code-995471/)
- [995472: Plastering](https://busy.in/sac-code-995472/)
- [995473: Painting](https://busy.in/sac-code-995473/)
- [995474: Floor Wall Tiling](https://busy.in/sac-code-995474/)
- [995476: Carpentry](https://busy.in/sac-code-995476/)
- [995477: Railing](https://busy.in/sac-code-995477/)
- [995478: Building Completion](https://busy.in/sac-code-995478/)
- [995479: Maintenance](https://busy.in/sac-code-995479/)

### All SAC headings

- [99: All Services Accounting](https://busy.in/sac-code-99/)
- [9954: Services in building & construction](https://busy.in/sac-code-9954/)
- [9961: Services in wholesale trade](https://busy.in/sac-code-9961/)
- [9962: Services in retail trade](https://busy.in/sac-code-9962/)
- [9963: Accommodation, food & beverage services](https://busy.in/sac-code-9963/)
- [9964: Passenger transport services](https://busy.in/sac-code-9964/)
- [9965: Goods transport services](https://busy.in/sac-code-9965/)
- [9966: Rental services of transport vehicles](https://busy.in/sac-code-9966/)
- [9967: Supporting services in transport](https://busy.in/sac-code-9967/)
- [9968: Postal & courier services](https://busy.in/sac-code-9968/)
- [9969: Electricity, gas & water supply services](https://busy.in/sac-code-9969/)
- [9971: Financial & related services](https://busy.in/sac-code-9971/)
- [9972: Real estate services](https://busy.in/sac-code-9972/)
- [9973: Leasing or rental services](https://busy.in/sac-code-9973/)
- [9981: Research & development services](https://busy.in/sac-code-9981/)
- [9982: Legal & accounting services](https://busy.in/sac-code-9982/)
- [9983: Professional, technical & business services](https://busy.in/sac-code-9983/)
- [9984: Telecommunications & broadcasting supply services](https://busy.in/sac-code-9984/)
- [9985: Support services to business](https://busy.in/sac-code-9985/)
- [9986: Support services to agriculture, hunting, forestry & more](https://busy.in/sac-code-9986/)
- [9987: Maintenance, repair & installation services](https://busy.in/sac-code-9987/)
- [9988: Manufacturing services on physical inputs](https://busy.in/sac-code-9988/)
- [9989: Services in publishing, printing & bookbinding](https://busy.in/sac-code-9989/)
- [9991: Public administration & other services](https://busy.in/sac-code-9991/)
- [9992: Education services](https://busy.in/sac-code-9992/)
- [9993: Human health & social care services](https://busy.in/sac-code-9993/)
- [9994: Sewage & waste collection](https://busy.in/sac-code-9994/)
- [9995: Services of membership organizations](https://busy.in/sac-code-9995/)
- [9996: Recreational, cultural & sporting services](https://busy.in/sac-code-9996/)
- [9997: Other Services](https://busy.in/sac-code-9997/)