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LUT filing for exporters

A Letter of Undertaking lets eligible exporters ship zero-rated without blocking cash in IGST. Here's how it works.

By the Launch My Office team · Updated 2026-06-22 · 5 min read

Exports are zero-rated under GST. You can either pay IGST and claim a refund, or file a Letter of Undertaking (LUT) and export without paying IGST at all — much kinder to cash flow.

Why exporters file an LUT

How to file

  1. Log in to the GST portal.
  2. Go to Services → User Services → Furnish LUT.
  3. Complete Form RFD-11 for the financial year.
  4. Submit with DSC/EVC.
If you export services digitally, the LUT route plus tidy bank/FIRC documents is usually the cleanest zero-rated trail. We can help set it up.

LUT vs refund route

LUT avoids the refund cycle entirely; the pay-and-refund route blocks cash until the refund lands. Most regular exporters prefer the LUT.

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Frequently asked questions

What is an LUT in GST?

A Letter of Undertaking that lets eligible exporters supply zero-rated without paying IGST, filed yearly via Form RFD-11.

Who can file an LUT?

Most exporters who haven't been prosecuted for serious tax offences. It's filed per financial year.

Is LUT better than claiming a refund?

For cash flow, usually yes — it avoids paying IGST and waiting for a refund.

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  • ✓ Free consultation on VPOB, APOB & GST
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