Tools Hub

Retirement Account Contribution TVM Planner

Compare different monthly contribution levels and their impact on your future retirement savings.

Time Value of Money (TVM) Calculator

Enter any four variables among N, I/Y, PV, PMT and FV, select the unknown variable and payment timing, then click Calculate.

This tool is for learning and estimation only and does not constitute any investment, loan or financial advice.

TVM Input Area

Payment Timing

Most loans and bonds use end-of-period payments; some rents and annuities use beginning-of-period payments.

Unknown Variable (to be calculated)

Make sure the other four variables are filled in clearly. Empty fields are treated as unknown.

All cash flows (PV, PMT, FV) currently have the same sign. In TVM problems, usually at least one cash flow should have the opposite sign (one side pay, the other side receive).

Result

After filling in four variables and selecting the unknown variable, click "Calculate" to see the result here.

Sign convention: Positive numbers usually represent cash inflow (receive), and negative numbers represent cash outflow (pay). For example, taking out a loan: PV is positive (receive money), PMT is negative (repay each period).

This tool is implemented purely in the browser and does not store any data. All calculations are for teaching/learning and estimation only and do not constitute any investment or lending recommendation.

401(k) Contribution Optimization Calculator

See how increasing your 401(k) contribution rate by a few percentage points can significantly boost your retirement balance over time.