How to modify SIP amount or date on Coin

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Zerodha Coin does not currently support direct in-app editing of a running SIP’s instalment amount or debit date for most fund AMCs. The standard procedure to change either parameter is to cancel the existing SIP and register a new SIP with the desired settings. This guide explains both the direct-edit path (where available) and the cancel-and-restart workflow, along with mandate management considerations.

Prerequisites

  • An active Zerodha trading and demat account with complete KYC.
  • At least one active SIP in your Coin portfolio.
  • TOTP authenticator for Zerodha two-factor login.
  • UPI app or net banking access for mandate registration if the new SIP amount requires an updated mandate.

Why direct SIP modification is often unavailable

An SIP on Coin is linked to a payment mandate (UPI autopay or NACH) registered with a specific amount ceiling. When you change the SIP amount, the underlying mandate may also need to change if the new amount exceeds the mandate limit. Because mandates are registered with the payment system (NPCI for UPI, NACH for bank mandates) and not just with Coin, changes require re-registration at the payment network level.

Additionally, BSE StAR MF (the order routing platform Coin uses) and individual AMCs have their own rules for SIP modification. Many AMCs do not support modification of a registered SIP and require a cancel-and-new registration workflow. Coin passes through these AMC constraints.

Step-by-step procedure

Step 1: Log in to Coin

Navigate to coin.zerodha.com or open the Coin mobile app. Log in with your Zerodha client ID, password, and TOTP.

Step 2: Go to your SIPs

From the dashboard or portfolio menu, navigate to Portfolio > SIPs. This page lists all your active SIPs with fund names, instalment amounts, frequencies, next SIP dates, and mandate types.

Step 3: Open the SIP detail page

Click the SIP you want to modify. The SIP detail page shows the complete history of past instalments and available action buttons.

Step 4: Check for a direct Edit option

Look for an Edit or Modify button on the SIP detail page. If this option exists for the fund’s AMC, click it. Coin may allow you to:

  • Increase or decrease the instalment amount (subject to AMC minimum and mandate limits)
  • Change the SIP debit date (to another date supported by the AMC for that scheme)

If the edit option is available, make the desired changes, re-authorise the mandate if required, and confirm. The new settings apply from the next instalment.

Step 5: Cancel the existing SIP (if direct edit is unavailable)

If no Edit option exists, cancel the current SIP. Go to the SIP detail page and click Cancel SIP. See How to pause or cancel an SIP on Coin for the cancellation procedure.

Timing: Submit the cancellation at least 5 to 7 business days before the next scheduled SIP date. This ensures the next instalment is not debited after cancellation. If the cancellation is too close to the SIP date, one more instalment may be debited; this is normal payment-system behaviour.

Cancelling the SIP does not affect the units already purchased. They remain in your CDSL demat account.

Step 6: Register a new SIP with updated parameters

After cancelling, set up a new SIP on the same scheme from scratch:

  1. On the Coin dashboard or Holdings page, search for and open the same scheme.
  2. Click SIP on the fund detail page.
  3. Enter the new instalment amount.
  4. Select the new SIP date (choose a date at least 7 to 10 business days from today to allow mandate registration).
  5. Select the frequency.
  6. Proceed to mandate registration.

See How to start an SIP on Coin for the full SIP setup procedure.

Step 7: Register or update the payment mandate

If the new SIP amount is within the existing mandate limit: You may be able to reuse the existing UPI autopay or NACH mandate. Coin will prompt you to select an existing mandate if one is active.

If the new amount exceeds the existing mandate limit: You must register a new mandate:

  • UPI autopay: Register a new e-mandate with the higher ceiling through the UPI app. Cancel the old mandate from the UPI app after the new one is active.
  • NACH: Submit a new NACH mandate form to your bank with the revised amount ceiling. NACH registration takes up to 30 days.

For SIP amounts above the UPI per-transaction limit set by NPCI (typically Rs 1 lakh per transaction for standard mandates; some banks and payment apps allow higher limits for mutual fund mandates), use NACH.

See How to set up an SIP via UPI autopay on Coin for UPI autopay mandate details.

Step 8: Verify the new SIP

Return to Portfolio > SIPs. Confirm:

  • The old SIP status shows “Cancelled”.
  • The new SIP appears as “Active” with the updated amount and new SIP date.
  • The mandate reference number is shown and is active.

Managing the gap between old and new SIP

When you cancel and restart an SIP, there is typically a gap of 1 to 2 months between the last instalment of the old SIP and the first instalment of the new SIP (due to the notice period for cancellation and the mandate registration time for the new SIP).

To fill this gap and maintain the investing pace:

  • Place a one-time lump-sum purchase in the same scheme for the instalment amount(s) you will miss during the transition.
  • Set the new SIP date to the earliest feasible date after the new mandate is active.

Top-up SIP as an alternative to modification

Some AMCs support a Top-up SIP (also called SIP Booster or Step-up SIP) that automatically increases the SIP instalment amount at a defined frequency (for example, Rs 500 more every year). If the only change you want to make is an annual increase in the SIP amount, a top-up SIP registered at the outset avoids the need for future modifications.

Coin supports top-up SIP for AMCs that enable this feature. Check the SIP setup flow for a “Top-up” option when registering a new SIP.

What can go wrong

Cancellation too late: Cancelling too close to the SIP date may not prevent the next instalment. This instalment is a valid purchase and cannot be reversed.

New mandate registration delay: NACH mandates take up to 30 days. If you set the new SIP date before the NACH mandate is active, the first instalment will fail.

Amount below minimum: The new SIP amount must meet the AMC’s minimum SIP amount. Check the fund’s SID.

Double debit risk: If the old SIP is not cancelled before the new SIP starts (for example, if you accidentally register a second SIP without cancelling the first), two instalments may be debited in the same month. Monitor Portfolio > SIPs carefully and ensure the old SIP shows “Cancelled” before the new one’s first date.

References

  1. SEBI (Mutual Funds) Regulations, 1996, as amended.
  2. AMFI Guidelines on SIP operations.
  3. NPCI UPI Recurring Mandate Framework (updated limits and e-mandate procedures).
  4. NACH Operational Procedural Guidelines, National Payments Corporation of India.
  5. Zerodha Coin support documentation (support.zerodha.com).

Reviewed and published by

WebNotes Editorial Team

The WebNotes Editorial Team covers Indian capital markets, payments infrastructure and retail investor procedures. Every article is fact-checked against primary sources, principally SEBI circulars and master directions, NPCI specifications and the official support documentation published by the intermediary in question. Drafts go through a second-pair-of-eyes review and a separate compliance read before publication, and revisions are tracked against the SEBI and NPCI rule changes referenced in the methodology section.

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