Mutual Fund TER Impact Calculator
Every mutual fund scheme is available in two versions: a Direct Plan, bought straight from the fund house, and a Regular Plan, bought through a distributor or advisor. Both hold the exact same underlying portfolio — the only real difference is TER (Total Expense Ratio), since the Regular Plan's TER is higher to cover the distributor's commission. This calculator isolates exactly what that TER gap costs you over your investment period.
Enter your monthly SIP investment, the fund's gross return (before any TER), the Direct Plan's TER, the Regular Plan's TER, and your investment period. The calculator shows both plans' net returns and final value side by side, plus the total impact of choosing Regular over Direct.
Mutual Fund TER Impact Calculator Formula
Each plan's net return is calculated by subtracting its own TER from the fund's gross return:
Direct Plan Net Return = Gross Return − Direct Plan TER
Regular Plan Net Return = Gross Return − Regular Plan TER
Each plan's value is then calculated using the standard SIP future value formula, applying its own net return:
Value = P × [ ( (1 + i)^n − 1 ) / i ] × (1 + i)
- P = Monthly investment amount
- i = Monthly rate of return (net annual return ÷ 12 ÷ 100)
- n = Total number of monthly installments (years × 12)
The TER Impact — the actual cost of choosing the Regular Plan — is simply the difference between the two:
TER Impact = Direct Plan Value − Regular Plan Value
Example Calculation
Suppose you invest ₹5,000 every month for 20 years in a fund with a gross return of 12%. The Direct Plan has a TER of 1%, while the Regular Plan of the same fund has a TER of 2% (a fairly typical gap between the two).
- Monthly Investment: ₹5,000
- Fund's Gross Return: 12%
- Direct Plan TER: 1% (Net Return: 11%) | Regular Plan TER: 2% (Net Return: 10%)
- Time Period: 20 years
| Metric | Direct Plan | Regular Plan |
|---|---|---|
| Net Return | 11% | 10% |
| Invested Amount | ₹12,00,000 | ₹12,00,000 |
| Total Value | ₹43,67,865 | ₹38,28,485 |
Both plans hold the same underlying portfolio and received the same ₹12,00,000 in contributions, yet the Direct Plan ends up worth approximately ₹5,39,381 more than the Regular Plan — purely because of the 1% TER difference compounding against the Regular Plan over 20 years. This is the real, quantifiable cost of the distributor commission built into Regular Plans.
FAQs about Mutual Fund TER Impact Calculator
What is TER (Total Expense Ratio)?
TER is the total annual cost a mutual fund charges investors, covering fund management fees, administrative costs, and (for Regular Plans) distributor commission, expressed as a percentage of the fund's assets. It's deducted from the fund's NAV daily, so it's automatically reflected in the returns you see rather than billed separately.
Why is a Regular Plan's TER higher than a Direct Plan's?
Because a Regular Plan includes a trail commission paid to the distributor or advisor who sold you the fund, built into the TER. A Direct Plan, purchased directly from the fund house or its website with no intermediary, doesn't carry this commission, so its TER is lower — typically by 0.5% to 1.5%, depending on the fund category.
Is the portfolio different between Direct and Regular Plans of the same fund?
No. Both plans invest in the exact same portfolio of stocks or bonds and are managed by the same fund manager with the identical strategy. The NAV, and therefore the returns before TER, are effectively the same — the only structural difference is the TER (and consequently, a different NAV figure since it compounds differently over time).
Should I switch from a Regular Plan to a Direct Plan?
For many investors, switching to a Direct Plan can meaningfully improve long-term returns, as this calculator illustrates. However, switching involves redeeming your Regular Plan units and reinvesting in the Direct Plan, which may trigger capital gains tax and exit load — it's worth calculating whether the TER savings outweigh these one-time switching costs for your specific holding.
Do I lose an advisor's guidance if I invest in a Direct Plan?
Yes, Direct Plans don't come with distributor-provided advice or support, since that's what the additional TER in a Regular Plan typically pays for. If you value ongoing professional guidance and are comfortable paying for it through a higher TER, a Regular Plan (or a fee-only advisor alongside Direct Plans) may still suit you better than pure cost optimization.
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