Savings Growth Tracker

Savings growth over time is calculated using the future value of an annuity formula: FV = PMT x ((1 + r)^n - 1) / r, where PMT is your monthly deposit, r is the monthly interest rate (annual rate / 12), and n is the total number of months. For a starting balance, add the future value of a lump sum: FV_lump = P x (1 + r)^n. Together, these two formulas give your total corpus at any point in time. The savings growth calculator on this page applies both formulas simultaneously and shows the year-by-year breakdown.

Rs 10,000 per month saved at 7% annual interest compounded monthly over 20 years grows to approximately Rs 52.4 lakh. At 10% annual interest, the same Rs 10,000 monthly grows to approximately Rs 76.6 lakh. At 12% (equity mutual fund long-term average), it grows to approximately Rs 99.9 lakh -- nearly Rs 1 crore. The difference between 7% (FD rate) and 12% (equity SIP) over 20 years on Rs 10,000 monthly is Rs 47.5 lakh, purely from the higher compounding rate.

To reach Rs 1 crore at 12% annual return: in 10 years, you need to save Rs 43,470 per month. In 15 years, Rs 19,800 per month. In 20 years, Rs 10,010 per month. In 25 years, Rs 5,320 per month. In 30 years, Rs 2,860 per month. The required monthly saving halves roughly every 5 years at 12% CAGR because of the exponential nature of compounding. Starting early is the most powerful lever to reduce the monthly savings burden.

A step-up savings plan increases your monthly savings amount by a fixed percentage each year, typically 5% to 15%. This mirrors how salaries typically grow and allows your savings rate to keep pace with income growth without requiring a large monthly commitment upfront. A Rs 5,000 monthly SIP stepped up by 10% each year becomes Rs 5,500 in year 2, Rs 6,050 in year 3, and Rs 12,969 in year 10. Over 20 years, a step-up SIP substantially outperforms a flat SIP started at the final year's higher amount.

Inflation reduces the real purchasing power of your savings. If your savings earn 7% annually and inflation runs at 5%, your real return is approximately 1.9% using the Fisher equation: Real Return = (1 + nominal) / (1 + inflation) - 1. For long-term goals like retirement, always calculate the inflation-adjusted corpus required. A retirement goal of Rs 5 crore in today's terms becomes Rs 8.14 crore in 15 years at 5% inflation. Use the inflation-adjusted mode in this savings tracker to account for this.

Savings growth in this calculator refers to depositing a fixed amount each month into an interest-bearing account (like a savings account, FD, or RD) at a fixed guaranteed rate. SIP (Systematic Investment Plan) returns are for mutual fund investments where the rate of return is not fixed and varies with market performance. A 7% savings account has guaranteed growth; a 12% SIP assumes equity market returns that may fluctuate year to year. The savings growth calculator is best for modeling guaranteed-rate instruments. For SIP, use the dedicated SIP Calculator.

With simple interest, interest is earned only on the principal. With compound interest, interest is earned on the principal plus all previously earned interest. On Rs 1,00,000 at 7% over 10 years: simple interest gives Rs 70,000 total interest (Rs 1,70,000). Compound interest (annually) gives Rs 96,715 total interest (Rs 1,96,715). The difference grows exponentially over longer periods: over 30 years, compound interest on Rs 1,00,000 at 7% gives Rs 6,61,227 versus Rs 2,10,000 with simple interest.

For long-term savings (3 years or more), an FD offers significantly higher rates (6.5% to 7.75%) compared to savings accounts (2.7% to 7%). The key differences: savings accounts offer full liquidity with penalty-free withdrawal, while FDs charge premature withdrawal penalties of 0.5% to 1%. For an emergency fund, a savings account or liquid fund is better. For a goal-based savings target 2 to 5 years away, an FD ladder strategy locks in higher rates while maintaining periodic liquidity.

A typical home in a Tier-1 Indian city costs Rs 80 lakh to Rs 2 crore. Banks finance 75% to 80% of the property value, requiring a down payment of 20% to 25%. For a Rs 1 crore property, you need Rs 20-25 lakh down payment plus Rs 3-5 lakh for registration, stamp duty, and legal costs. Saving Rs 25,000 per month for 5 years at 7% annual interest gives approximately Rs 18.1 lakh. Saving Rs 40,000 monthly for the same period gives Rs 29 lakh. Use the savings tracker to set a target date and find the required monthly contribution.

The Rule of 72 estimates how many years it takes to double your savings: Years to double = 72 / Annual Interest Rate. At 7% annual interest: 72 / 7 = approximately 10.3 years. At 12%: 72 / 12 = 6 years. At 3% (typical savings account): 72 / 3 = 24 years. This rule only applies to lump-sum amounts without additional deposits. For savings with monthly contributions, the doubling happens much faster because new money is being added continuously.

An existing starting balance has a disproportionate impact on long-term savings because it compounds from day one while new contributions are added gradually. Rs 5,00,000 starting balance at 8% for 20 years grows to Rs 23.3 lakh from that balance alone. Adding Rs 10,000 monthly for the same 20 years at 8% adds Rs 58.9 lakh. The combined corpus is Rs 82.2 lakh. Without the starting balance (just Rs 10,000 monthly at 8%): Rs 58.9 lakh. The starting balance contributed Rs 23.3 lakh in growth on Rs 5 lakh invested -- a 4.66x multiplication.

Fermor is an Indian fintech platform providing free financial calculators and a financial eligibility engine. The savings growth tracker is part of a suite of 525+ calculators covering savings, SIP, home loans, tax, and retirement planning. Fermor is free at fermor.in.