Inflation Calculator

How the Formula Works

Calculated using the standard future value annuity formula:
M = P × [((1 + i)ⁿ - 1) / i] × (1 + i)

Where P is monthly deposit, i is monthly interest rate (annual return ÷ 12), and n is total months. Compounding produces an exponential curve where interest earns interest on itself over decades.

Nepal Regulatory Realities

• SEBON Regulation: Open-ended mutual funds are managed by licensed Asset Management Companies (NIBL Ace, Siddhartha, Sanima) under SEBON directives.
• Digital Mandate: Auto-debits occur via ConnectIPS or direct bank standing orders on salary day.
• Tax Advantage: Individual capital gains on mutual fund units are taxed at only 5% on redemption, vastly lower than progressive salary tax slabs.

Decision Guide & Common Errors

• Do Not Stop in Bear Markets: Stopping your SIP when NEPSE falls eliminates Rupee-Cost Averaging-the exact mechanism that buys cheap units and drives future outperformance.
• Not a Bank FD: A 12% projected return is an illustrative long-term historical equity reference, not a guaranteed contractual yield.
• Minimum Horizon: SIPs require at least 5 to 7 years to smooth short-term equity market volatility.

The Reducing Balance Engine

Commercial banks compute interest strictly on the declining principal balance:
EMI = [P × r × (1 + r)ⁿ] / [(1 + r)ⁿ - 1]

Where P is principal, r is monthly interest, and n is months. In early years, up to 70% of your EMI goes toward interest. As principal reduces, interest drops and equity builds. Beware of informal cooperatives quoting "10% Flat Rate"-a 10% flat rate actually equates to an effective APR of over 18.5%!

NRB Directives & Borrowing Limits

• Base Rate + Premium: Interest rates equal the bank's published quarterly Base Rate plus a fixed premium spread (e.g. 8.0% Base + 2.5% Premium = 10.5%).
• DSTI 50% Rule: NRB limits your total monthly loan EMIs across all banks to a maximum of 50% of verified post-tax income.
• LTV Financing Caps: Banks finance up to 70% for first-time residential home buyers, 50% for Kathmandu real estate, and 80%-90% for Electric Vehicles (EVs).

Prepayment Power & Common Traps

• Zero Prepayment Penalty: Under NRB circulars, commercial banks cannot charge prepayment penalty fees on floating-rate individual home loans.
• The 1-Extra EMI Hack: Paying just 1 extra monthly EMI per year directly toward principal cuts a 20-year mortgage down by nearly 4.5 years and saves millions in interest.
• The Max-Tenure Trap: Choosing a 30-year tenure to lower monthly EMI can cause you to pay more than 160% of the original loan value in pure interest alone.

The Drawdown Mathematics

Calculated month-by-month using iterative compounding:
Bₜ = Bₜ₋₁ × (1 + r/12) - W

Where Bₜ is the remaining balance, r is the annual growth rate, and W is the periodic cash withdrawal. As long as your withdrawal rate (W ÷ Total Corpus) stays below the net real return, your principal survives permanently.

Tax Efficiency vs Bank Fixed Deposit

• FD Interest Tax Drag: Commercial banks deduct 5% TDS upfront on 100% of the interest earned annually, eroding capital compound speed.
• Mutual Fund Capital Gains: Under an SWP, redemptions represent capital return plus capital gain. Only the net capital gain portion is taxed at 5% CGT, leaving unredeemed units compounding tax-free.
• ConnectIPS Direct Credit: Fund managers (AMCs) deposit monthly pension payouts directly to your commercial bank account on the 1st of every month.

Sequence of Returns Risk & The 3.5% Rule

• The Bear Market Trap: Withdrawing during an early NEPSE downturn forces selling more units at rock-bottom NAVs, causing permanent portfolio impairment.
• The 3-Year Cash Bucket: Maintain 2 to 3 years of living expenses in liquid fixed deposits or short-term debentures to fund cash flow during market corrections.
• Safe Withdrawal Rate: In Nepal's 6%-7% inflation environment, a conservative 3.0%-3.5% initial withdrawal rate provides bulletproof multi-decade sustainability.

How Progressive Slabs Work

Moving into a higher tax bracket never decreases your net take-home salary.

Each tax rate applies strictly to the incremental rupees inside that specific band. For an unmarried earner: the first NPR 5 Lakhs is taxed at 1% (or 0% with SSF), the next NPR 2 Lakhs at 10%, the next NPR 3 Lakhs at 20%, the next NPR 10 Lakhs at 30%, and income exceeding NPR 20 Lakhs at 36% (plus a 39% super-tax on earnings above NPR 50 Lakhs).

Legal Tax Deductions Checklist

• Section 63 Retirement Funds: Deduct up to one-third of total taxable salary or NPR 5,00,000 (whichever is lower, per Finance Act 2080+) by depositing into CIT, EPF, or SSF.
• SSF 1% Exemption: Employees enrolled in the Social Security Fund (SSF) are 100% exempt from the 1% Social Security Tax on their first income slab.
• Insurance Relief: Deduct up to NPR 40,000 for Life Insurance premiums and NPR 20,000 for Health Insurance premiums annually.

Common Mistakes & Compliance

• TDS ≠ Final Tax: TDS deducted by your employer or bank is an advance payment. You must reconcile your annual return (Form D-01) on the IRD portal.
• Unlinked PAN in Demat: Forgetting to link your PAN with your Demat broker account causes automatic maximum capital gains tax withholding without setoff rights.
• Document Retention: Section 81 of the Income Tax Act requires preserving all tax clearance certificates, invoices, and bank statements for at least 5 years.

SEBON Broker Commission Slabs

• Up to NPR 50,000: 0.40% (minimum fee NPR 10)
• NPR 50,001 to 5,00,000: 0.37%
• NPR 5,00,001 to 20,00,000: 0.34%
• NPR 20,00,001 to 1,00,00,000: 0.30%
• Above NPR 1 Crore: 0.27%
• Plus: SEBON Regulatory Fee (0.015%) and CDSC DP Fee (NPR 25 per transfer).

WACC & Capital Gains Tax (CGT)

• WACC in MeroShare: Weighted Average Cost of Capital must be calculated and declared via MeroShare EDIS before transferring sold shares.
• Individual Short-Term (≤365 Days): 7.5% CGT on net profit.
• Individual Long-Term (>365 Days): 5.0% CGT on net profit, incentivizing multi-year investing.
• Institutional Investors: 10.0% CGT on net realized profit.

Break-Even Friction & Over-Trading

• Round-Trip Drag: Buying and selling incurs approximately 0.8% to 1.1% in cumulative friction fees. A stock must rise at least ~1.0% just for you to break even.
• The Small-Order Penalty: The flat NPR 25 DP fee and minimum NPR 10 broker charge disproportionately penalize micro-orders under NPR 5,000.
• EDIS Deadline: Failure to complete EDIS transfer on MeroShare before 6:00 PM on T+1 causes an immediate 20% close-out penalty auction charge.

Quarterly Compounding Formula

Nepali banks compound interest on fixed deposits every quarter (every 3 months):
A = P × (1 + r/4)⁴ⁿ

Where P is principal, r is annual interest rate, and n is tenure in years. Because interest is credited 4 times a year and added to principal, the Effective Annual Rate (EAR) is approximately 0.25% to 0.40% higher than the nominal stated coupon rate.

NRB Circulars & Safety Net

• DCGF Deposit Guarantee: Under the Deposit and Credit Guarantee Fund (DCGF), individual retail deposits are statutorily insured up to NPR 5,00,000 per depositor per licensed institution.
• Institutional Spread: By NRB circular, institutional fixed deposit rates must be at least 1.0% lower than individual retail rates.
• Rate Adjustment Limits: Banks can only adjust their published monthly deposit interest rates by a maximum of 10% relative to the prior month.

TDS, Real Returns & Liquidity

• 5% Final Withholding: Resident individual deposit interest is subject to a 5% TDS deduction at source by the bank, which is a final tax.
• Inflation Trap: An 8.0% FD yields 7.6% net after 5% TDS. If annual inflation is 6.5%, your real purchasing power expands by only 1.1%.
• Loan Against FD: You can borrow up to 90% of your FD balance within 2 hours at an interest rate just 1% to 2% higher than your FD coupon, avoiding premature liquidation penalties.

Retirement Corpus Mathematics

Required corpus is determined by inflation-adjusted future annual expenses:
Corpus = Annual Expense × (25 to 30)

At 6.5% inflation, an NPR 50,000 monthly living cost today balloons to over NPR 1,76,000 per month in 20 years. To safely withdraw NPR 21 Lakhs annually for 25+ years without risking bankruptcy, an inflation-adjusted corpus of ~NPR 3.2 to 3.8 Crores is required.

Nepal's 3 Retirement Pillars

• Pillar 1 (SSF - Social Security Fund): Mandatory 31% contribution (20% employer + 11% employee) provides lifetime monthly pension from age 60, medical reimbursement, and dependent survivor protection.
• Pillar 2 (CIT / EPF): Statutory provident funds providing Section 63 tax deductions (up to NPR 3 Lakhs), 80% loan access, and capital preservation.
• Pillar 3 (Personal Growth Investments): Open-ended mutual fund SIPs, blue-chip NEPSE dividend equities, and real estate that generate inflation-beating capital growth.

The Nepal-Adapted 3.5% Rule

• Why the US 4% Rule Fails: Developed economies have 2% inflation and deep bond markets. In Nepal, 6.5% inflation requires withdrawing a conservative 3.0% to 3.5% annually.
• Critical Illness Isolation: Earmark a standalone health insurance policy (NPR 10-20 Lakhs sum insured) to ensure sudden private hospital bills do not force premature corpus liquidation.
• The Cost of Delay: Waiting 10 years to begin retirement investing forces you to invest nearly 3.5× more money each month to achieve the exact same retirement nest egg.

What CAGR Measures

CAGR measures the mean annual growth rate of an investment over a specified multi-year period assuming profits were reinvested and compounded each year.

CAGR vs Simple Average

Dividing total return by years creates an arithmetic average that ignores the compounding effect ("interest on interest") and grossly exaggerates true multi-year performance.

Arithmetic vs Geometric Return

In volatile assets like NEPSE shares, arithmetic return is always higher than geometric CAGR. A 50% gain followed by a 50% loss averages 0%, yet leaves you with a 25% net loss.

When to Use (and When Not To)

Use CAGR for multi-year lump sum holdings like NEPSE blue-chips, gold, or land. Do not use CAGR for recurring monthly SIPs (use XIRR) or short-term day trades.