How to start an SIP with a One-Time Mandate?

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Systematic Investment Plans or SIPs are a convenient way to put money into mutual funds through easy instalments over a tenure that suits you. The process has become even simpler ever since the National Payments Corporation of India introduced the National Automatic Clearing House (NACH) facility for inter-bank periodic payments in 2016. Through this system, all you need to do is initiate a one-time mandate (OTM) authorising a vendor to debit money directly from your bank account.
In the context of mutual fund SIP investments, you can issue an OTM allowing the transfer of your instalment amount from your bank account to the chosen fund on a set date every month.
This means that after taking the first step in your investment journey, the rest happens seamlessly and automatically. Through SIP investments, you have the potential to build wealth over time. Read on to understand how to start an SIP with OTM.

  • Table of contents:
  1. How exactly do NACH and OTM work?
  2. How to set up an OTM for SIP?
  3. Through the NACH Mandate form
  4. Through E-NACH
  5. FAQ

How exactly do NACH and OTM work?

A NACH mandate or OTM authorises a vendor to debit money directly from your bank account. This system was introduced in 2016 for inter-bank bulk transfers, before which banks used the more tedious Electronic Clearing System or ECS. NACH was introduced as a centralised system to bring together all regional ECS systems across the country.
Once you authorise a particular collection agency through a one-time mandate, you need not repeatedly issue a cheque or initiate an online bank transfer. The money is automatically debited from your bank account on a fixed date.
NACH can be used by banks, businesses, and government bodies. It can be used for loan repayment, bill payments, transfer of government benefits, salary disbursements, mutual fund SIP transactions and several other recurring and periodic payments.

How to set up an OTM for SIP?

This one-time registration process gives a standing instruction to your bank allowing the mutual fund company to debit a certain amount from your bank account on a set date every month. The money towards your SIP investment goes from your bank account as per your schedule every month, week, quarter, or any other chosen frequency. The OTM is also valid on other mutual fund investments with the same asset management company.
There are two ways to set up a one-time mandate for your SIP investments:

Through the NACH Mandate form

Once you have decided which mutual fund to invest in, you can get the OTM form from the fund house’s website. You will be required to fill in the following details:

  • Bank account information, including bank name, account number and IFSC code.
  • Your name as per bank documents. Some forms may also ask for your Permanent Account Number or PAN, registered mobile number, residential address or other personal information.
  • The amount that you want to invest per SIP and the frequency. You may also need to enter a mandate limit, which is the maximum amount that can be debited from your account for that mandate. The upper limit can be higher than your SIP – similar to how a credit limit works – but the fund will only debit only the pre-determined instalment amount. This is so that if you increase your SIPs later, or start another SIP with the same fund house, you don’t need fresh paperwork.
  • The start and stop date for the SIP. If you have planned a fixed number of investments, you can enter the start and end date of your SIP. Or you can choose the ‘until I Stop’ option if you plan to stay invested for an undefined period.
    Once you’ve filled out the form, you can sign it and submit it to the asset management company. Some websites may have the option to upload the signed OTM form online, while others may require you to submit a hard copy to the fund house. You may also have to submit a cancelled cheque. The OTM activation can take up to 10 days.

Through E-NACH

Many banks have the e-NACH facility, which does away with the need for paperwork. All you need to do is fill in a few basic details, including your name and bank account information on the fund house’s website, after which the mandate is authorised through net banking or debit card. E-NACH mandates are usually registered in two to three days; some banks may do so even sooner. Since your paperwork is completed online, there is no need to fill out and share any physical documents.


One-time mandates make the process of investing in mutual funds seamless and easy. The auto-deduction of money from your bank account saves you the trouble of having to remember your due date or initiate a transfer or cheque payment for each instalment. Depending on your preference, you may choose the physical NACH mandate option or set it up online.


What documents are needed for a one-time mandate SIP?

You typically need KYC documents, bank details, and a filled SIP registration form to set up a one-time mandate SIP.

Can I change the investment amount in a one-time mandate SIP?

Usually, the investment amount is fixed for a one-time mandate SIP. However, some funds might allow you to adjust it under certain conditions

Mutual Fund Investments are subject to market risks, read all scheme related documents carefully.
This document should not be treated as endorsement of the views / opinions or as an investment advice. This document should not be construed as a research report or a recommendation to buy or sell any security. This document is for information purpose only and should not be construed as a promise on minimum returns or safeguard of capital. This document alone is not sufficient and should not be used for the development or implementation of an investment strategy. The recipient should note and understand that the information provided above may not contain all the material aspects relevant for making an investment decision. Investors are advised to consult their own investment advisor before making any investment decision in light of their risk appetite, investment goals and horizon. This information is subject to change without any prior notice.