Download your Word document
Sinking Fund Contribution result sheet — free, supported by sponsors. Your download button appears in 20 seconds.
This free download is supported by sponsors — continuing in
20
Your file is generated in your browser when you choose Download — nothing is uploaded. If this calculator returns enough numeric data, the export also includes its best-fit chart alongside the readable table.
WorldCalculate result export
Sinking Fund Contribution — result sheet
Estimate the regular end-of-period contribution needed to reach a future target after accounting for an existing balance and periodic growth.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Required periodic contribution = (target − current balance×(1+i)^n)×i/((1+i)^n−1), where i is the periodic rate and n is the number of periods; zero-rate uses target shortfall/n.
A sinking fund turns a future target into a regular saving amount. This model grows the current balance and assumes equal contributions arrive at the end of each period. If the current balance alone reaches the target under the stated growth assumption, the required contribution is zero and the surplus is shown. The answer is a planning estimate rather than a guaranteed account yield or a recommendation about where to keep money.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Target amount — currency units; minimum 0.01; maximum 1000000000000
- Current balance — currency units; minimum 0; maximum 1000000000000
- Annual growth rate — % per year; minimum 0; maximum 100
- Years — years; minimum 1.0E-6; maximum 100
- Contributions per year — contributions/year; minimum 1; maximum 365
Worked example
| Input | Value |
|---|---|
| Target amount | 10000 |
| Current balance | 2000 |
| Annual growth rate | 6 |
| Years | 3 |
| Contributions per year | 12 |
The calculator grows the 2,000 starting balance monthly and returns the equal end-of-month contribution required to reach 10,000 after 36 periods.
Assumptions and limits
- The annual growth rate is converted to a nominal periodic rate by dividing by the number of contributions per year.
- Contributions are equal and occur at the end of each period.
- The existing balance compounds at the same periodic rate as the future contributions.
- The target, balance, and contribution use the same currency and timing convention.
- No tax, account fee, deposit limit, inflation adjustment, missed contribution, or changing rate is modeled.
- A real savings product can compound differently; compare the scenario with its account terms.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
No saved result was found. Please run the calculation first, then choose Download again.