Calculate future wealth from monthly recurring investments (SIP). Model Step-Up contributions, inflation purchasing power, tax drag, and SIP vs Lumpsum growth.
| Year | Starting Balance | Deposits | Cumulative Deposits | Interest Earned | Ending Balance | Real Purchasing Power |
|---|---|---|---|---|---|---|
| Yr 1 | $0.00 | $6,000.00 | $6,000.00 | $404.66 | $6,404.66 | $6,158.33 |
| Yr 2 | $6,404.66 | $6,000.00 | $12,000.00 | $1,216.94 | $13,621.60 | $12,593.93 |
| Yr 3 | $13,621.60 | $6,000.00 | $18,000.00 | $2,132.22 | $21,753.82 | $19,339.07 |
| Yr 4 | $21,753.82 | $6,000.00 | $24,000.00 | $3,163.60 | $30,917.42 | $26,428.34 |
| Yr 5 | $30,917.42 | $6,000.00 | $30,000.00 | $4,325.76 | $41,243.18 | $33,898.89 |
| Yr 6 | $41,243.18 | $6,000.00 | $36,000.00 | $5,635.34 | $52,878.52 | $41,790.66 |
| Yr 7 | $52,878.52 | $6,000.00 | $42,000.00 | $7,110.98 | $65,989.50 | $50,146.60 |
| Yr 8 | $65,989.50 | $6,000.00 | $48,000.00 | $8,773.78 | $80,763.28 | $59,012.94 |
| Yr 9 | $80,763.28 | $6,000.00 | $54,000.00 | $10,647.47 | $97,410.75 | $68,439.50 |
| Yr 10 | $97,410.75 | $6,000.00 | $60,000.00 | $12,758.79 | $116,169.54 | $78,479.98 |
A Systematic Investment Plan (SIP) is a recurring-investment approach in which a fixed amount of capital is contributed at regular periodic intervals (typically monthly). This calculator models the mathematical compound growth of those recurring contributions under a selected return assumption.
Contributions made in earlier periods experience compounding returns over longer time horizons, generating non-linear wealth accumulation over 10, 20, or 30 years.
Allocating a fixed dollar amount across fluctuating market cycles purchases more asset units when prices are lower and fewer when prices are higher, mitigating single point-in-time entry risk.
Because automated recurring contributions are credited at the beginning of each monthly period, the calculator models accumulation using the compounding formula for the Future Value of an Annuity Due:
When the expected return assumption is set to 0.0%, the compounding formula simplifies to a linear sum:
Under zero returns, total maturity value equals exactly total cash deposits ($P × n$) with $0.00 in estimated gains. For evaluating single lump-sum compound interest frequencies, explore our compound interest calculator.
To illustrate how annuity-due monthly compounding operates, let us evaluate the mathematical model under a hypothetical scenario:
A Step-Up SIP models increasing your monthly contribution by an annual percentage (e.g., +10%/year) to match annual salary raises.
| Strategy ($500/mo Base, 10Y Horizon, 12% Return) | Total Invested | Projected Returns | Total Maturity Value | Decomposition |
|---|---|---|---|---|
| Flat Contribution ($500/mo) | $60,000.00 | $56,169.54 | $116,169.54 | Baseline |
| 10% Annual Step-Up | $95,624.55 | $73,091.77 | $168,716.31 | +$35,624.55 deposits + $16,922.23 returns (+$52,546.77 total) |
Under identical return assumptions, increasing periodic contributions expands final projected maturity value because more total capital is deployed into compounding periods.
Choosing between recurring monthly contributions and a single upfront lump-sum deposit is a scenario-dependent decision:
To evaluate single lump sums under various discount rate and duration assumptions, use our future value calculator or examine historical annualized growth using our CAGR calculator.
Long-term financial projections must account for purchasing power erosion and potential tax liability:
Nominal maturity figures are discounted exponentially:
To analyze purchasing power changes across consumer price indices, visit our inflation calculator.
The calculator applies a simplified percentage deduction against estimated gains (excluding principal):
This provides an illustrative estimate. Actual tax liabilities depend on jurisdiction, account type, asset holding periods, and applicable statutory tax brackets.
Solves for the estimated monthly contribution required to achieve a target future goal:
Example: Accumulating $250,000 in 15 years @ 9% return models a required deposit of $655.75/month ($118,035 principal + $131,965.63 returns).
Models periodic cash distributions during retirement while remaining capital continues compounding.
Under the calculator's constant-return assumptions, a withdrawal amount below periodic portfolio growth can theoretically preserve the balance. Actual retirement portfolios are subject to volatility, fees, inflation, and sequence-of-returns risk. For full retirement planning, use our retirement calculator.
Assuming a hypothetical 10% or 12% modeling rate represents guaranteed annual growth rather than a volatile long-term average.
Ignoring annual mutual fund management fees. A 1% ongoing expense ratio can erode tens of thousands of dollars over multi-decade horizons. Compare fund fees with our mutual fund fee calculator.
Evaluating long-term wealth targets solely in nominal dollars without checking constant-dollar purchasing power.
Halting automated recurring contributions during market pullbacks, which disrupts cost averaging and long-term compounding discipline.
A Systematic Investment Plan (SIP) is a recurring-investment approach in which a fixed amount is contributed at regular periodic intervals (typically monthly). This calculator models the mathematical compound growth of those recurring contributions under a selected return assumption.
For the recurring-contribution model used by this calculator, the underlying compounding mathematics is identical. 'SIP' is standard terminology internationally (particularly in India and the UK), while US financial institutions and investors typically use 'recurring investment,' 'monthly contribution,' or 'automated dollar-cost averaging.' Actual commercial investment products can differ in fees, taxes, custody, and transaction mechanics.
The calculator evaluates the compounding formula for an Annuity Due: M = P × [((1+i)^n - 1) / i] × (1+i), where P is the monthly contribution, i is the monthly periodic return rate (Annual Return / 12 / 100), and n is the total number of monthly compounding periods.
In automated recurring investment schedules, contributions are credited at the beginning of each monthly cycle, allowing that month's deposit to earn a full month of compound returns during the period.
A Step-Up SIP increases your monthly contribution by a specified percentage (e.g., 10%) or fixed dollar amount once per year, aligning investment growth with career earnings and salary raises.
Inflation reduces the future purchasing power of money. The calculator computes real purchasing power using exponential discounting: Real Value = Nominal Value / (1 + Inflation Rate)^Years.
The calculator applies a simplified percentage deduction against estimated capital gains (excluding original principal contributions). It serves as an illustrative model rather than an official multi-bracket tax filing engine.
No. Market investments are subject to price volatility and capital risk. The return rate entered into the calculator is a hypothetical modeling assumption, not a guaranteed return forecast.
Lump-sum investing deploys all capital upfront, gaining maximum compounding duration if markets rise immediately. Recurring monthly investing spreads capital deployment across time, mitigating point-in-time market peak risk.
Goal Seeker inverts the compounding annuity-due formula to solve for the monthly contribution needed to reach a target financial goal under your chosen time horizon and return assumptions.
Calculations execute 100% client-side in your browser using standard IEEE 754 floating-point annuity-due compounding equations. The SIP Health Score is a calculator-generated heuristic indicator based on tenure and accumulation ratios, not a fiduciary investment evaluation. This calculator is provided for educational and mathematical scenario modeling only and does not constitute investment advice, financial planning, or a recommendation to purchase specific securities. Past historical performance does not guarantee future results.