SIP Calculator + Lumpsum

The engine behind this calculator combines two classic financial growth models: compound interest for a single initial principal (lump sum) and the future value of an ordinary annuity (systematic investment plan or SIP). The base relationship uses your expected annual rate of return (r), compounding frequency (CompFreq), and payment frequency (PayFreq q). Growth rates adjust via g + 1 = (1 + g_p) ^ PayFreq_q to bridge periodic rates with annual expectations. The calculator evaluates the total time horizon (t) from your StartDate, tallies the absolute number of periodic investments (num_sips), and aggregates both your initial lump sum corpus and total systematic contributions (total_sip_res) to project the definitive final balance (final_balance_res).

Imagine you have an initial lump sum of $10,000 ready to deploy today. In addition, you commit to investing $500 every month via a systematic investment plan (SIP) for a duration of 10 years (120 months) with an expected annual rate of return of 10 percent compounded monthly. First, the $10,000 lump sum compounds over 120 months. Second, the monthly $500 SIP contributions grow as an annuity earning returns compounded each payment period. By summing the future value of the initial lump sum and the accumulated future value of the 120 individual SIP installments (total_sip_res of $60,000 principal plus investment gains), the calculator accurately aggregates your total portfolio value, giving you a crystal-clear projection of your ultimate financial destination.

Maximizing dual investment strategies requires balancing risk and liquidity. When markets experience significant downward corrections, consider deploying small tactical lump sums alongside your automated SIP to pick up units at lower valuations. Always align your compounding and payment frequencies correctly in the calculator settings to ensure payment alignment matches your actual bank debit schedules. Finally, remember to toggle inflation adjustment features to evaluate your future corpus in today's purchasing power.