Conceptual · Article 2.1.1.1

Overnight Funds.

Q: Is an overnight fund better than keeping money in a savings account?

For money you won't need for at least a few days, overnight funds typically beat savings accounts (3-3.5%). But savings accounts offer instant 24/7 access with DICGC insurance, while overnight funds settle T+1 with no deposit insurance. Practical split: 1-2 months expenses in savings for true emergencies, rest in an overnight fund.

Q: Can I park my monthly salary here while I decide where to invest it?

Yes — this is one of the best use cases. Many professionals park salary for 1-2 weeks in an overnight fund while deciding on SIP allocations, rather than leaving it in a 3% savings account or zero-interest current account.

Q: Is the money safe if the AMC shuts down?

Yes. SEBI requires mutual fund assets be held separately from the AMC's balance sheet in a trust structure with an independent custodian. If an AMC shuts down, your funds transfer to another SEBI-approved AMC or are redeemed at prevailing NAV. Structural separation is a key investor protection.

Q: Do overnight fund returns go up when the RBI raises interest rates?

Yes — directly. When RBI raises rates, overnight lending rates rise, and your fund's daily accrual increases. Conversely, in FY 2025-26 as RBI cut the repo rate from 6.50% (Jan 2025) to 5.25% (Dec 2025), overnight fund yields declined in step.

Q: Is there a risk of losing the principal I invest?

Extremely unlikely but theoretically not impossible. The main risk — a counterparty defaulting on an overnight loan — is mitigated by mandatory G-Sec collateral backing every TREPS transaction. Overnight funds in India have not experienced principal loss historically, but this is not a guarantee.

Q: How is an overnight fund different from a Fixed Deposit?

An FD locks money for a fixed term with 0.5-1% penalty for early break. Overnight funds have no lock-in, no penalty, full flexibility — but no fixed guaranteed return. FDs up to ₹5L per depositor per bank are DICGC-insured; overnight units carry no such insurance. For money with a fixed 6+ month timeline, FDs often deliver better after-tax returns.

One-Day Lending Via G-Sec-Backed TREPS. Cash Parking, Not Wealth Building.

Published as on 28 May 2026

An Overnight Fund is a SEBI-regulated debt mutual fund that lends your money for exactly one business day at a time — collects it back the next morning — then repeats. Loans are primarily routed through TREPS (Tri-Party Repo) and are always backed by Government Securities as collateral. The portfolio matures and resets every single business day. FY 2025-26 net yield approximately 4.9-5.3% on Direct plans (RBI repo 5.25%, SDF 5.00% as of Dec 5, 2025). Friday investments earn a weekend bonus — 3 days of interest in one settlement. Taxed at your slab rate always under Finance Act 2023 — no holding-period benefit. NOT DICGC-insured, but interest-rate risk is near-zero.

~5% Net

Direct Plan Yield (FY26)

1 Day

Max Maturity (SEBI)

Slab Rate

Tax — Any Holding Period

3 Days

Friday Weekend Bonus

Executive Summary · Page 2

Executive Summary · 6 Findings

Overnight funds are designed for one specific question: "Where do I put money I may need tomorrow, without risking a rupee of principal?" The return is modest because the risk is minimal. You pay for certainty, not for growth.

This article covers how the daily TREPS-and-reset mechanism works, where overnight funds sit in the 16-category debt-fund map, the FY 2025-26 yield context, the Finance Act 2023 slab-rate taxation, how they compare to liquid funds and savings accounts, and the five common mistakes Indian investors make with this category.

Key Findings

Daily reset via G-Sec-collateralised TREPS.

Every business day the fund lends money overnight (primarily through TREPS managed by CCIL) and collects it back next morning with one day of interest. Loans are always backed by Government Securities — credit risk is effectively sovereign or CCIL clearing-house. SEBI's June 27, 2024 Master Circular bars overnight funds from holding corporate bonds, commercial paper, or anything with credit uncertainty. The portfolio matures every single business day.

Shortest of 16 SEBI debt-fund categories — near-zero duration risk.

SEBI defines 16 debt mutual fund categories. Overnight funds are the shortest. Maximum maturity: 1 day. Interest rate sensitivity: near-zero. Compare to liquid (91 days, very low), ultra-short (3-6 months, low), short duration (1-3 years, moderate), and long duration / gilt (high to very high). Overnight sidesteps duration risk entirely — by tomorrow morning, all loans are repaid.

FY 2025-26 net yield ~4.9-5.3%, tracking RBI's SDF rate.

Overnight returns track the RBI's SDF rate (Standing Deposit Facility — the floor at which banks park surplus with RBI overnight). As of Dec 5, 2025: repo 5.25%, SDF 5.00%. Expected gross yield 5.0-5.4%; Direct-plan expense ratio 0.05-0.15%; net to investor ~4.9-5.3% annualised. RBI cuts (6.50% Jan 2025 → 5.25% Dec 2025) pulled yields down in step.

Friday weekend bonus: 3 days of interest in one settlement.

Invest on a Friday → the overnight loan spans Friday night, Saturday, and Sunday until Monday morning. You earn 3 days of interest in one accrual. This makes overnight funds meaningfully better than non-interest-bearing current accounts over long weekends and public holidays. ₹5L at ~5.1%: weekend accrual ~₹210 (vs ~₹70 single weeknight).

Tax: slab rate always since April 1, 2023. No date split, no LTCG, no indexation.

Under Finance Act 2023, all gains from debt mutual funds are taxed at your slab rate regardless of holding period — whether you hold 1 day or 4 years. No "long-term" treatment. No indexation. The July 23, 2024 Finance Act 2024 date split does NOT apply to debt MFs — that rule covers real estate, gold, unlisted shares, foreign ETFs. Always pick Growth option (not IDCW) — both are taxed at slab rate but IDCW creates a paperwork mess.

Cash parking, NOT a debt allocation.

This is a cash-management tool — emergency fund parking, deployment buffer (money waiting for SIPs), short-term expenses (15-30 days), business/HUF treasury. NOT for long-term debt allocation, NOT for inflation-beating, NOT a savings-account substitute (no DICGC insurance, not instant 24/7 access). Use it for the "cash/liquidity" sleeve, not the "debt" sleeve. Zero exit load, no lock-in — SEBI mandated.

At A Glance

Metric	Value	Detail
Max Maturity	1 Day	Resets every business day
Primary Instrument	TREPS	G-Sec collateralised via CCIL
Duration Risk	Near-Zero	By design
Gross Yield (FY26)	~5.0-5.4%	Tracks RBI SDF corridor
Direct Plan ER	0.05-0.15%	Deducted daily from yield
Net Yield	~4.9-5.3%	Pre-tax, Direct plan
Tax	Slab Rate Always	FY 2023 onwards — no LTCG
Settlement	T+1	Instant rarely available

Exhibit 01: ₹5L for 30 Days at ~5.1% Net

Line Item	Amount
Investment	₹5,00,000
Daily accrual	~₹70
Weekend (Fri-Mon)	~₹210 (3 days)
30-day total (pre-tax)	~₹2,096

Not exciting. Not meant to be. You're paying for stability and liquidity, not for returns.

The Opening · Page 3

The Opening

Imagine ₹1 lakh sitting unused in your bank account for the next two weeks. You want it to do something useful, but you might need it any day. A savings account pays 3-4% per year. An overnight fund offers a market-linked alternative — typically 5.0-5.4% annualised net — with your money technically lent out for just one business day at a time, against Government Security collateral. The portfolio matures every morning. There is virtually no waiting for your money to "come back" — because it already did, this morning.

"Overnight funds answer one specific question: where do I put money that I may need tomorrow, or next week, without risking even a rupee of principal? They are not built to compete with fixed deposits on returns. The return is modest because the risk is minimal. You are not being shortchanged — you are paying for certainty."
The Purpose Design

The daily flow: (1) You invest ₹1 lakh today. (2) The fund lends via TREPS (Tri-Party Repo, managed by CCIL), always backed by Government Securities as collateral. (3) Borrower repays next morning with one day's interest. (4) Fund adds that to NAV and lends again the same night. (5) Repeat every business day until you redeem. SEBI's June 27, 2024 Master Circular bars this category from corporate bonds, commercial paper, or any instrument with credit uncertainty — so credit exposure is effectively sovereign or CCIL clearing-house risk.

The Friday weekend bonus: Invest on a Friday → the overnight loan spans Friday night, Saturday, and Sunday until Monday morning. You earn 3 days of interest in one settlement. Meaningful improvement over a non-interest-bearing current account across long weekends or public holidays. ₹5 lakh at ~5.1%: a weekend nets ~₹210 vs ~₹70 single weeknight.

What it is NOT: NOT a government guarantee (unlike PPF, or bank FDs insured up to ₹5 lakh per depositor per bank under DICGC). NOT "zero risk" — minimal risk. NOT equivalent to a savings account — market-linked, not fixed; T+1 settlement, not instant. NOT a long-term debt allocation tool. It belongs in your cash/liquidity sleeve, not your debt sleeve.

Structure

Part I

Daily Mechanism, Debt-Fund Map, and Risk Profile

Part II

Returns, RBI Rate Linkage, and Slab-Rate Taxation

Part III

Overnight vs Liquid vs Savings, Use Cases, Five Mistakes

Part IV

The Verdict: Cash Tool, Not Debt Allocation

What These Funds Do

✓ Eliminate duration risk (1-day max)

✓ Use G-Sec-backed TREPS only

✓ Reset NAV daily, predictably

✓ Zero exit load, no lock-in

What They Do NOT Do

✕ Carry DICGC deposit insurance

✕ Offer instant 24/7 redemption

✕ Beat inflation reliably

✕ Replace your debt allocation

Part I

Daily Mechanism, the Debt-Fund Map, and Risk Profile

How the lend-collect-relend cycle eliminates duration risk, where overnight sits in SEBI's 16-category debt landscape, and an honest accounting of the residual risks that remain.

Part I: Mechanism & Risk · Page 4

The Daily Cycle

Five-Step Reset

(1) You invest ₹X today.
(2) Fund lends overnight via TREPS (Tri-Party Repo managed by CCIL), backed by Government Securities as collateral.
(3) Borrower repays next morning with one day's interest.
(4) Fund adds the day's accrual to NAV; re-lends the same night.
(5) Repeats every business day until redemption.

The portfolio matures and resets every single business day. The waiting period for money to "come back" is zero — it already returned this morning.

SEBI's 16-Category Debt Map

Category	Max Maturity	Rate Sensitivity
Overnight	1 day	Near-zero
Liquid	91 days	Very low
Ultra-Short	3-6 months	Low
Short Duration	1-3 years	Moderate
Long Duration	7+ years	High
Gilt	Variable	Very high

The longer the maturity, the more sensitive a fund is to interest-rate changes. Overnight sidesteps duration risk entirely — by tomorrow morning, all loans are repaid. The trade-off: lowest yield in the entire debt-fund universe.

Honest Risk Accounting

What's Minimised

Duration risk: eliminated. Nothing held more than 1 business day.
Price volatility: near-zero. NAV moves in small, predictable daily increments.
Credit risk: structurally constrained. SEBI bars corporate bonds and commercial paper in this category. TREPS is G-Sec-collateralised; CCIL is the clearing counterparty. Effectively sovereign-grade exposure.

What Remains (Small but Real)

Residual credit risk: a black-swan systemic event is theoretically possible — though it has never materialised in India's overnight fund history.

Liquidity note: standard redemption is T+1 — request today, money tomorrow. Unlike liquid funds (commonly offering instant redemption up to ₹50,000), overnight funds rarely offer instant access. If you need ATM-like speed at any hour, keep that portion in a savings account or liquid fund.

No DICGC insurance: overnight fund units are NOT deposit-insured (unlike bank FDs up to ₹5L per depositor per bank under DICGC). They are market-linked instruments under SEBI regulation.

Bottom-line risk framing: overnight funds are the lowest-interest-rate-risk debt category. They are not zero-risk and not deposit-insured. They are minimal-risk and SEBI-regulated. For cash you may need within days to weeks, that profile usually beats a savings account on yield — though it loses on instant access and insurance.

Part II

Returns, RBI Rate Linkage, and Slab-Rate Taxation

How overnight yields track the RBI SDF corridor, what to realistically expect in rupees, and why the Finance Act 2023 made debt funds straightforward and unambiguous on tax.

Part II: Returns & Tax · Page 6

FY 2025-26 Yield Context

RBI Rate Corridor (Dec 5, 2025)

Repo rate: 5.25% (the ceiling — RBI lends to banks).
SDF rate: 5.00% (the floor — banks park surplus with RBI overnight).

Overnight market rates trade within the 5.00-5.25% corridor. Expected gross yield to fund: ~5.0-5.4% annualised. Direct-plan expense ratio: 0.05-0.15% deducted daily. Net to investor: ~4.9-5.3% annualised.

Rate-Cycle Impact

RBI cut repo from 6.50% (Jan 2025) to 5.25% (Dec 2025) — a 125 bps reduction. Overnight fund yields declined in step. When RBI raises rates, the opposite happens — yields rise within days. There is no lag and no manager skill driving returns. The product is purely rate-linked.

Realistic Returns — Rupees

Investment	Period	Pre-Tax Yield
₹5,00,000	30 days	~₹2,096
₹5,00,000	Weekend (Fri-Mon, 3 days)	~₹210
₹10,00,000	30 days	~₹4,192
₹1,00,000	1 year	~₹5,000 (~3.5% post-tax at 30%)

For someone parking ₹10-50 lakh in business float, advance-tax funds, or deployment capital, the predictability has real value that a percentage comparison with FD returns fails to capture. For long-term wealth, the same product is a poor choice — post-tax returns may not even beat inflation.

Taxation Under Finance Act 2023

Slab Rate Always — No Exception

From April 1, 2023, ALL gains from debt mutual funds — including overnight funds — are taxed at the investor's slab rate, regardless of holding period. Whether you hold 1 day or 4 years, it is always your slab rate. No "long-term" or "short-term" capital gains distinction for this category. No indexation. No special rate.

The Finance Act 2024 (July 23, 2024) date split — offering indexation options for pre-July 23 holdings — covers real estate, gold, unlisted shares, and foreign ETFs. It does NOT apply to debt mutual funds. Debt has been on the simple slab-rate system since April 1, 2023.

New Regime Tax Slabs (FY 2025-26)

Annual Income	Slab Rate
Up to ₹4 lakh	Nil
Up to ₹12 lakh (with 87A rebate)	Effective Nil
₹12-15 lakh	20%
Above ₹15 lakh	30%

Growth vs IDCW + No TDS Note

Always choose Growth option. IDCW distributes daily earnings as "dividends" — also taxed at slab rate, but with paperwork mess of frequent small transactions and no tax benefit.

No TDS for residents: mutual funds do NOT deduct TDS at source on capital gains redemptions for resident individuals. You declare and pay at ITR time. (NRIs see TDS at redemption.)

Part III

Overnight vs Liquid vs Savings, Use Cases, and Five Mistakes

Where overnight wins and where liquid wins, the legitimate use cases for the cash sleeve, the practical emergency-fund split, and the five mistakes that turn a stable tool into a frustrating one.

Part III: Comparisons & Use Cases · Page 8

Overnight vs Liquid Fund

Feature	Overnight	Liquid
Max maturity	1 day	91 days
Primary instrument	TREPS (G-Sec)	T-Bills, CPs, CDs, TREPS
Rate sensitivity	Near-zero	Very low (small)
Net yield (FY26)	~4.9-5.3%	~5.3-5.8%
Best horizon	Days to 2 weeks	2 weeks to 3 months
Instant redemption	Rarely	Up to ₹50K commonly
Exit load	Zero (SEBI)	Graded first 7 days

Choose overnight when horizon is days, or when even tiny NAV fluctuation feels uncomfortable. Choose liquid for instant ₹50K access or for 1-3 month parking with slightly higher yield tolerance.

Cash Sleeve Comparison

Option	Net Yield	Access
Savings (private bank)	~3.0-3.5%	24/7 instant
Overnight Fund	~4.9-5.3%	T+1
Liquid Fund	~5.3-5.8%	T+1 / ₹50K instant
1-Year FD	~6.5-7.0%	On maturity + penalty

Practical split for ₹3.6L emergency fund (6 months × ₹60K expenses): 1-2 months in savings for true emergencies; 4-5 months in overnight or liquid fund. Earns more without losing meaningful access.

Legitimate Use Cases

✓ Emergency fund parking — part of 3-6 month corpus

✓ Deployment buffer — money waiting for equity SIP / investment

✓ Short-term expenses (15-30 days) — advance tax, insurance premium, school fees

✓ Business / HUF treasury — working capital, vendor payment buffer, advance tax corpus

Five Common Mistakes

Holding for years expecting meaningful compounding

At ~5% net pre-tax, ₹1L grows to ₹1,05,000 after a year. Post-tax for a 30% bracket investor: ~3.5% — close to or below inflation. Not a wealth builder.

Ignoring Growth vs IDCW

Always pick Growth. IDCW creates frequent dividend credits taxed at slab rate with no benefit — only paperwork.

Assuming it equals a savings account

Not a bank deposit. Not DICGC-insured. Market-linked. The distinction matters in extreme scenarios.

Treating "low duration" as "no credit risk"

Duration risk is gone. Credit risk is structurally minimised (G-Sec-collateralised TREPS) but not theoretically zero.

Using it as a long-term debt allocation

Cash-management tool, not strategic debt. Park in your "cash/liquidity" bucket — not in the "debt allocation" sleeve.

How to invest: Complete KYC (one-time, valid across all Indian MFs) → choose Direct plan, Growth option of any SEBI-registered AMC's overnight fund → invest lump sum → redeem anytime (T+1 settlement). No exit load. No lock-in. No early withdrawal penalty — SEBI-mandated for this category.

Part IV

The Verdict

Cash tool, not debt allocation. Stability you pay for, not wealth you wait for.

Part IV: The Verdict · Page 10

30-Second Summary

Overnight funds are SEBI-regulated debt mutual funds that lend money for exactly one business day at a time via G-Sec-backed TREPS. The portfolio matures and resets every business day — eliminating duration risk and price volatility. FY 2025-26 net yield ~4.9-5.3% on Direct plans, tracking the RBI SDF corridor (5.00-5.25%). Friday-to-Monday investments earn 3 days of interest in one settlement.

Tax treatment is the simplest of any debt category: under Finance Act 2023, gains are taxed at your slab rate regardless of holding period. No LTCG benefit. No indexation. The Finance Act 2024 date split does not apply to debt MFs. Always pick Growth (not IDCW). No TDS for resident individuals at redemption — declare and pay at ITR time.

"This category answers: where do I put money I may need tomorrow, without risking a rupee? It does NOT answer: how do I grow wealth, beat inflation, or build a retirement corpus. The 5% net return is the price of certainty. The post-tax 3.5% return for a 30% bracket investor is the price of using it for the wrong purpose."
The Final Orientation

The Bottom Line: Overnight funds belong in your cash/liquidity sleeve — not your debt allocation, not your investment sleeve. Use them for emergency fund parking (4-5 months of expenses), deployment buffer (money waiting for SIPs), short-term known expenses (15-30 days), or business treasury. Use savings accounts for instant-access emergency money (1-2 months expenses). Use liquid funds for 1-3 month parking with marginally higher yield. Use FDs for 6+ month known timelines. Use overnight funds for stability, not growth. The product is honest about what it is. Mismatches happen only when investors expect more.

ADWIZR · May 2026

Decision Rules

Use Correctly As

✓ Cash sleeve, days to weeks

✓ Direct plan, Growth option

✓ Weekend/holiday float

✓ Pre-deployment SIP buffer

Misuse Destroys Value

✕ Long-term debt allocation

✕ Expecting savings-account features

✕ IDCW option (paperwork mess)

✕ Treating as DICGC-insured

~5% Net

Direct plan

Pre-tax, FY26

Slab Rate

Always

Any holding period

T+1

Settlement

Zero exit load

Investor FAQ

Questions Indian Investors Ask

Seven questions, answered directly.

Investor FAQ · Page 12

Frequently Asked Questions

Q1 Is an overnight fund better than keeping money in a savings account?

For money you won't need for at least a few days, an overnight fund typically offers a higher expected return than most savings accounts (which pay 3-3.5%). However, savings accounts offer instant 24/7 access with DICGC insurance, while overnight funds settle T+1 with no deposit insurance. Practical approach: keep 1-2 months of expenses in a savings account for true emergencies; park the rest in an overnight fund.

Q2 Can I park my monthly salary here while I decide where to invest it?

Yes — one of the best use cases. Many working professionals park their monthly salary for 1-2 weeks in an overnight fund while deciding on SIP transfers or other investments, rather than leaving it in a zero-interest current account or 3% savings account.

Q3 Is the money safe if the AMC shuts down?

Yes. SEBI regulations require that mutual fund assets be held separately from the AMC's own balance sheet in a trust structure with an independent custodian. If an AMC shuts down, your funds are not lost — they are transferred to another SEBI-approved AMC or redeemed at prevailing NAV. This structural separation is a key investor protection.

Q4 Do overnight fund returns go up when the RBI raises interest rates?

Yes — directly. When RBI raises rates, the overnight lending rate rises and your fund's daily accrual increases. Conversely, in FY 2025-26 as RBI progressively cut the repo rate from 6.50% (January 2025) to 5.25% (December 2025), overnight fund gross yields declined in step. There is no lag and no manager skill — purely rate-linked.

Q5 Can a business or HUF invest in overnight funds?

Yes. Businesses, HUFs, trusts, and individuals can all invest. Businesses commonly use them for treasury management — parking working capital, staff salary buffers, vendor payment pools, or advance tax corpus between payment dates with SEBI-regulated safety.

Q6 Is there a risk of losing the principal I invest?

Losing principal is extremely unlikely but theoretically not impossible. The main risk — a counterparty defaulting on an overnight loan — is mitigated by mandatory G-Sec collateral backing every TREPS transaction. In practice, overnight funds in India have not experienced principal loss, but this historical safety does not constitute a guarantee.

Q7 How is an overnight fund different from a Fixed Deposit?

An FD locks money for a fixed term; breaking it early incurs a 0.5-1% interest penalty. An overnight fund has no lock-in, no penalty, full flexibility — but no fixed guaranteed return. FDs up to ₹5 lakh per depositor per bank are DICGC-insured; overnight units carry no such insurance. For money with a fixed, known timeline of 6 months or more, an FD often delivers better after-tax returns.

Key Terms & Definitions

Overnight Fund

A SEBI-regulated debt mutual fund category whose holdings must all mature within one business day. Cannot invest in corporate bonds, commercial paper, or any instrument with credit uncertainty. The shortest-duration category among 16 SEBI debt-fund classifications.

TREPS

Tri-Party Repo — a secured, anonymous overnight lending arrangement managed by CCIL (Clearing Corporation of India). All loans are backed by Government Securities as collateral. The primary instrument used by overnight funds, providing effectively sovereign-grade counterparty exposure.

RBI SDF Rate

Standing Deposit Facility — the floor rate at which banks park surplus cash with the RBI overnight (5.00% as of Dec 5, 2025). The repo rate (5.25%) is the ceiling. Overnight market rates and hence overnight fund yields track this corridor.

Weekend Bonus

When investments made on Friday earn interest for three days (Friday night, Saturday, Sunday) because the overnight loan spans the entire weekend until Monday morning. Meaningful advantage over non-interest-bearing current accounts across long weekends.

Finance Act 2023 Debt Tax Rule

Effective April 1, 2023, all gains from debt mutual funds (including overnight) are taxed at the investor's income tax slab rate regardless of holding period. No LTCG distinction, no indexation. The Finance Act 2024 date split for indexation does not apply to debt MFs.

DICGC Insurance

Deposit Insurance and Credit Guarantee Corporation coverage of ₹5 lakh per depositor per bank for bank deposits. Overnight funds (mutual fund units) are NOT DICGC-insured — this is the structural distinction from a savings account or fixed deposit.