What is TDS?
TDS, Tax Deducted at Source, is the Indian Income Tax mechanism that requires the payer of certain payments to deduct tax from the payment and deposit it directly with the government. The recipient receives the payment minus the deducted tax and gets credit for the deducted amount against their final tax liability. The mechanism exists to ensure tax collection at the point of payment rather than relying solely on year-end self-assessment.
For solar EPCs, TDS most commonly applies under Section 194C (contractor payments) or Section 194J (professional fees) when corporate or other audit-required customers pay for project work. The applicable rate depends on the section and the EPC's structure: 1 percent (individual/HUF) or 2 percent (company) for 194C; 10 percent for 194J. Higher rates apply if PAN is not provided.
TDS is distinct from GST. GST is an indirect tax on supplies; TDS is income tax. The same invoice can have both: GST charged on the supply and TDS deducted on the payment. Mechanically and operationally they are separate, governed by different statutes.
Why TDS matters for solar businesses
For solar EPCs working with corporate customers, TDS affects cash flow. The customer pays the invoice minus TDS. The EPC receives less cash immediately and must recover the TDS as tax credit later. For an EPC with significant corporate customer base, the cumulative cash withheld can be substantial.
For customers, TDS is a compliance obligation. Companies and other notified payers must deduct TDS, deposit it, file quarterly returns, and issue Form 16A. Failure to deduct or deposit attracts interest, penalty, and disallowance of the related expense.
For tax compliance, TDS is one of the foundational mechanisms ensuring income tax collection in India. The Annual Information Statement (AIS) consolidates TDS data alongside other income flows for taxpayers.
For working capital management, EPCs need to plan around TDS-related cash-flow timing. Corporate-heavy customer mix means more TDS withheld; SME and residential customer mix means less.
How TDS works on a solar EPC payment
- Contract execution. EPC and customer sign contract for solar project.
- Project work and invoice. EPC delivers and invoices for the work.
- Customer payment due. Customer prepares to pay the invoice.
- TDS deduction. If customer is required to deduct TDS, deducts at applicable rate.
- Payment to EPC. Customer pays the EPC the invoice amount minus TDS.
- TDS deposit. Customer deposits the deducted TDS with the government by the due date (typically 7th of following month).
- Form 16A issuance. Customer issues Form 16A to the EPC documenting the deduction.
- EPC tax credit. EPC's income tax computation includes the TDS as advance tax credit.
- Quarterly TDS return. Customer files quarterly TDS return (Form 26Q for non-salary).
- EPC's annual return. EPC files annual income tax return claiming TDS credit; net tax payable or refund as applicable.
Real example: TDS on a corporate solar contract
Contract. A 100 kWp commercial rooftop project for a manufacturing company in Pune. Contract value ₹50 lakh + 12 percent GST = ₹56 lakh.
TDS applicability. Customer is a company; project work falls under Section 194C contractor payments. TDS rate: 2 percent on the base value (excluding GST).
TDS calculation. 2 percent of ₹50 lakh = ₹1 lakh.
Net payment to EPC. ₹56 lakh minus ₹1 lakh = ₹55 lakh paid to EPC.
TDS deposit and credit. Customer deposits ₹1 lakh with government, issues Form 16A. EPC includes ₹1 lakh as tax credit in its income tax computation.
EPC's net tax impact. If EPC's annual tax liability is say ₹15 lakh, the ₹1 lakh TDS reduces the additional tax payable to ₹14 lakh. Net result: same total tax, different cash-flow timing.
Benefits of the TDS mechanism
- Ensures tax collection. Point-of-payment deduction reduces evasion risk.
- Government cash flow. Tax revenue flows continuously.
- Cleaner compliance. Annual reconciliation through AIS.
- Transparent records. Form 26AS / AIS shows all deductions.
- Standardised rates. Predictable structure for compliance.
- Cross-checks. Recipient and payer side filings reconcile.
Limitations and challenges
Cash-flow lag for recipient. Money withheld before recipient's tax liability is determined.
Compliance burden on deductor. Companies and audit-required customers carry deduction overhead.
Form 16A delays. Late issuance affects recipient's records.
Mismatch risk. Recipient and deductor side mismatches need reconciliation.
Higher rates for non-PAN. Penalty rate without PAN.
Cross-border complexity. Different rules for non-resident recipients.
Sectoral nuance. Different sections, rates, thresholds.
TDS in solar EPC contracts
| Scenario | Likely TDS section | Rate |
|---|---|---|
| EPC contract with corporate customer | 194C (contractor payments) | 1 or 2 percent |
| Pure consulting / professional services | 194J (professional fees) | 10 percent |
| EPC contract with individual residential customer | Usually not applicable | Nil |
| EPC contract with small business below audit | Usually not applicable | Nil |
| Pure goods supply | Generally not applicable | Nil |
| GST TDS (Section 51 CGST) | For notified entities | 2 percent if supply > ₹2.5 lakh |
| Higher rate (no PAN) | Penalty regime | Higher of normal rate or 20 percent |
Quick facts
| Full form | Tax Deducted at Source |
|---|---|
| Statute | Income Tax Act, 1961 |
| Common sections for solar EPC | 194C (contractor), 194J (professional) |
| Typical rate Section 194C | 1 percent (individual/HUF) or 2 percent (company) |
| Typical rate Section 194J | 10 percent |
| Higher rate (no PAN) | Higher of normal rate or 20 percent |
| Deposit due date | Typically 7th of following month |
| Reference statement | Form 26AS / AIS |
Common mistakes about TDS
- Confusing income tax TDS with GST TDS. Different statutes, different mechanisms.
- Missing TDS deduction obligation. Corporate customers required to deduct.
- Late deposit. Interest and penalty.
- Not providing PAN. Higher TDS rate.
- Failing to file quarterly return. Form 26Q for non-salary payments.
- Skipping Form 16A issuance. Recipient needs it for credit.
- Mismatched Form 26AS data. Reconciliation needed.
- Treating residential customer as required to deduct. Most residential not under TDS obligation.
- Forgetting that pure goods supply usually not under TDS. Service component triggers it.
- Manual TDS tracking. Modern accounting software automates.
Key takeaways
- TDS is the income tax mechanism where the payer deducts tax at source and deposits it with the government.
- For solar EPCs with corporate customers, TDS typically applies under Sections 194C or 194J.
- Rates: 1 to 2 percent (194C), 10 percent (194J), higher without PAN.
- Distinct from GST TDS, which has separate provisions.
- Form 26AS / AIS consolidates all TDS for the recipient.
- Cash-flow lag between TDS deduction and tax credit utilisation.
- Compliance via deductor's quarterly TDS return (Form 26Q).
Frequently Asked Questions
What is TDS?
TDS stands for Tax Deducted at Source. It is the mechanism under Indian Income Tax law that requires the payer of certain payments (salaries, contractor payments, professional fees, rent above thresholds, etc.) to deduct tax from the payment and deposit it with the government. The recipient gets credit for the deducted tax against their final tax liability.
Does TDS apply to solar EPC payments?
Yes, in specific scenarios. When a customer (often a company or large entity) pays an EPC for solar project work, TDS may apply on the service component under Section 194C (contractor payments) or 194J (professional services). The applicable section and rate depend on the contract structure and the payer's category.
What is the TDS rate for solar EPC contracts?
Typically 1 percent under Section 194C for contractor payments to individual or HUF deductee, 2 percent for company deductee. Higher rates apply if PAN not provided. Section 194J (professional fees) is at 10 percent.
Is TDS the same as GST?
No. TDS is under Income Tax. GST is a separate indirect tax. The two operate on different bases and serve different purposes. A solar EPC may face both TDS deduction by customer (income tax) and GST on the same invoice (indirect tax).
Who has to deduct TDS?
Persons specified in the Income Tax Act: companies, partnerships, individuals or HUFs above audit threshold, government departments, and other notified persons. Residential customers below audit threshold typically do not deduct TDS.
How does the EPC get credit for TDS?
The customer deducts TDS, deposits it with the government, and issues Form 16A. The EPC includes the TDS in its income tax computation and claims credit against final tax liability. Form 26AS (now AIS) shows TDS credit.
What is Form 26AS?
Form 26AS (now part of the Annual Information Statement or AIS) is the consolidated annual statement showing all TDS deducted from a taxpayer, TCS collected, advance tax, and other tax payments. It is the recipient's reference for claiming TDS credit.
Is TDS deducted on goods supply?
Generally no, under standard sections. TDS under Section 194C applies to work contracts. Pure goods supply typically does not attract TDS. However, mixed supply contracts (goods + services) need careful structuring.
What is TDS under GST (CGST/SGST TDS)?
Separate from income tax TDS. GST also has its own TDS provisions under Section 51 of CGST Act, applicable to certain government entities and notified deductors at 2 percent on supplies exceeding ₹2.5 lakh. This is GST TDS, separate from income tax TDS.
When is TDS deposited with the government?
Typically by the 7th of the following month for deductions made in a month. Government deductors have different timelines. Late deposit attracts interest and penalty.
What is the TDS return?
Quarterly statements filed by the deductor (TDS Return Form 26Q for non-salary). The customer files this with details of TDS deductions; the EPC's TDS credit is generated based on these filings.
How does TDS affect cash flow for solar EPCs?
The TDS is withheld at the time of customer payment. The EPC receives less cash immediately and recovers it through tax credit later. For EPCs working with large companies that deduct TDS, this creates a working capital lag of months between TDS deduction and tax credit utilisation.
Run your solar business on QuickEstimate
India's mobile-first solar CRM. Send subsidy-ready proposals on WhatsApp in 60 seconds. Free for 10 proposals a month, no card.
Start free →Sources
- Income Tax Act, 1961. TDS provisions including Sections 194C, 194J, others.
- Central Board of Direct Taxes (CBDT). TDS rules and notifications. incometax.gov.in
- Income Tax Department. Form 26AS, AIS, TDS return procedures.
- CGST Act Section 51. GST TDS provisions (separate from income tax TDS).
- ICAI publications. Sector-specific TDS guidance.
- Ministry of Finance. Budget changes affecting TDS.
- Chartered accountancy guidance. Solar EPC contract TDS treatment.
Written by QuickEstimate Editorial, QuickEstimate Editorial (Surat).
Last updated: 4 June 2026.