Portfolio Contribution
Show future portfolio value and how much of it you contributed.
About Portfolio Contribution
The current portfolio and annual deposits compound annually, and the share of the final value that came from your own money is separated out. Separating growth from deposits shows compounding's real payoff and makes the case for starting earlier rather than later.
Formula
Portfolio Contribution
FV = value x (1+r)^years + contribution x ((1+r)^years - 1)/r
- r
- Annual return, not divided for this annual-growth view
Worked example
With the default values below, Portfolio Contribution returns Future Value of $181,256. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Current valueminimum 0
- 50,000
- Annual contributionminimum 0
- 6,000
- Annual returnaccepts 0–30 %
- 7 %
- Yearsminimum 0.5 years
- 10 years
Results
- Future Value
- $181,256
- Total Contributed
- $60,000
- Contribution Share
- 33.1%
Step by step
- 1Values used
- 2Portfolio Contribution
- 3Future Value= 181,256
- 4Total Contributed= 60,000
- 5Contribution Share= 33.1
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax or fees or charges into account.
- Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
- This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Portfolio Contribution calculated?
FV = value x (1+r)^years + contribution x ((1+r)^years - 1)/r The current portfolio and annual deposits compound annually, and the share of the final value that came from your own money is separated out.
Why does Portfolio Contribution matter?
Separating growth from deposits shows compounding's real payoff and makes the case for starting earlier rather than later.
What values do I need to enter?
This calculator takes 4 inputs: Current value, Annual contribution, Annual return, Years. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.