Can I model changing interest rates?

Yes — add rows to the Variable Rate Schedule to model different annual rates during different periods.

Is this WordPress compatible?

Yes — paste this single-file block into a Custom HTML block in WordPress (Astra) and view the published page.

Compound Interest Calculator — Advanced (SaaS-grade)

Projections with variable rates, contributions, inflation adjustment, tax on gains, export, share links, live charts. Paste into a WordPress Custom HTML block (Astra compatible).

Live charts Variable rate schedule CSV export

Inputs & Scenario

Initial Principal ($)

Periodic Contribution ($)

Contribution Frequency

Base Annual Rate (%)

Compounds/Year

Term (Years)

Inflation (%)

Tax on Gains (%)

Target Goal ($)

Variable Rate Schedule

Optional: define year ranges with specific annual rates. Leave empty to use base rate.

Projection Summary

Ending Balance (nominal)

Ending (inflation-adjusted)

Total Contributions

Total Interest Earned

Goal Progress

Balance Over Time

Contributions vs Interest (cumulative)

Projection Table (Yearly summary)

You can export detailed period CSV

Year	Start Balance	Contributions	Interest	End Balance	Inflation-Adj

Compound Interest Calculator — Advanced (SaaS-grade)

Inputs & Scenario

Projection Summary

Projection Table (Yearly summary)

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