Systematic Transactions — SIP, STP, SWP Setup & Operations
Systematic plans repeat a transaction at set intervals: a SIP buys, an STP transfers and an SWP redeems. This lesson explains how each works, how holding periods and tax apply and what a SIP does and does not do.
Three plans
A Systematic Investment Plan (SIP) buys units regularly from the investor's bank account under a bank mandate. A Systematic Transfer Plan (STP) moves money regularly from a source scheme to a target scheme of the same fund house. A Systematic Withdrawal Plan (SWP) redeems units regularly and pays the money into the investor's bank account.
The minimum SIP instalment is set scheme by scheme in the Scheme Information Document; SEBI's Master Circular does not fix a figure. The limit on a bank mandate is a separate matter: it, and the time a mandate takes to set up, depend on the bank and the type of mandate.
Every instalment stands alone
Each SIP instalment is a separate purchase with its own purchase date and holding period. When units are redeemed, earlier instalments may have been held long enough to count as long-term while later ones are still short-term, so the tax on one redemption can differ from instalment to instalment.
Tax on STP, SWP and IDCW
Each STP transfer and each SWP withdrawal is a redemption from the source scheme, and so a taxable event if there is a gain. The purchase leg of an STP is not a taxable event.
In an SWP only the gain in the units redeemed is taxed, at the capital-gains rate for that type of fund. An IDCW payout is treated differently: for a resident individual the whole payout is income, taxed at the slab rate.
For funds holding more than 65% in debt and money-market instruments, bought on or after 1 April 2023, gains are taxed at the slab rate whatever the holding period (rates as of October 2026).
What a SIP does and does not do
Because the instalment is fixed, it buys more units when the NAV is lower and fewer when it is higher. The average cost per unit is the total amount invested divided by the total units bought.
Investing regularly averages the purchase price over time. It does not prevent a loss in a falling market.
Rules at a glance
One redemption, two tax treatments (illustrative)
Gauri invests in an equity-oriented fund through a monthly SIP that began on 5 January 2025. On 20 January 2026 she redeems all her units. The units bought on 5 January 2025 have been held for more than 12 months, so any gain on them is long-term.
The units bought on 5 February 2025 and after have been held for 12 months or less, so any gain on them is short-term. One redemption carries two tax treatments.
Average cost in a SIP and the gain in an SWP (illustrative)
- Assumptions for the arithmetic only, with stamp duty ignored: three SIP instalments of ₹12,000 are invested at NAVs of ₹40, ₹30 and ₹48.
- Units bought = 12,000 ÷ 40 + 12,000 ÷ 30 + 12,000 ÷ 48 = 300 + 400 + 250 = 950.
- Average cost per unit = ₹36,000 ÷ 950 = ₹37.89.
- If the NAV is ₹30 on a later date, the 950 units are worth 950 × ₹30 = ₹28,500, which is ₹7,500 less than the ₹36,000 invested.
- SWP, as a separate scenario: suppose instead that the NAV is ₹48 on the withdrawal date. A withdrawal of ₹9,600 then redeems 9,600 ÷ 48 = 200 units. Taken as sold first-in-first-out, they come from the first instalment, bought at ₹40, so the cost is ₹8,000 and the gain is ₹1,600.
Result. Averaging brought the cost per unit to ₹37.89 but did not prevent a loss at a NAV of ₹30. Of the ₹9,600 withdrawn through the SWP, only ₹1,600 is gain.
Key points
- The minimum SIP instalment is set in each scheme's offer document, not by SEBI's Master Circular.
- Each SIP instalment is a separate purchase with its own purchase date and holding period.
- Each STP transfer and each SWP withdrawal is a redemption, a taxable event if there is a gain; an STP's purchase leg is not.
- In an SWP only the gain is taxed; an IDCW payout is taxed as income at the slab rate.
- A SIP averages the purchase price; it does not prevent a loss.
Common misunderstandings
- A SIP does not protect against loss: it averages the purchase price, and the value can still be below the amount invested.
- A SIP has no single start date for tax: each instalment has its own holding period.
- An SWP withdrawal is not taxed in full: only the gain in the units redeemed is taxed, whereas an IDCW payout is taxed as income.
Questions people ask
Can an STP run between schemes of two fund houses?
An STP moves money from a source scheme to a target scheme of the same fund house.
Is the purchase leg of an STP taxed?
No. Only the redemption from the source scheme is a taxable event; the purchase starts a new holding period.
Who decides the limit on a SIP mandate?
The bank and the type of mandate, and the limit can change. It is separate from the scheme's minimum instalment.
What this lesson relies on
- SEBI Master Circular for Mutual Funds (20 March 2026) — systematic investment, transfer and withdrawal plans
- Income-tax Act, 2025 — capital gains on mutual fund units (sections 196 and 198) and taxation of income distributed by mutual funds
This lesson was reviewed independently against these sources on 8 October 2026. Rules change: check the current regulation, scheme document or policy wording before relying on any figure. This is education, not advice.