Investment & Portfolio Calculators
Understand how your investment choices and fees shape your long term outcomes. Compare growth rates, contribution levels and portfolio structures.
📈Investment Strategy
Your investment choices, fees, and portfolio structure significantly impact your retirement outcomes. These calculators help you compare ISAs, understand compound growth, and see how fees and tax drag affect long-term returns.
💼How these calculators help
Our Investment & Portfolio calculators model compound interest, compare Cash ISAs versus Stocks & Shares ISAs, calculate fee impacts, and show how different investment strategies affect your retirement timeline and wealth accumulation.
Your Investment Journey
A comprehensive investment strategy involves choosing the right accounts, understanding compound growth, and minimising fees. Use our calculators to build an optimal portfolio.
Compare Investment Accounts
Use the Cash ISA vs Stocks & Shares ISA Calculator to see which better supports your retirement goals and understand the trade-offs between safety and growth.
Understand Compound Growth
Use the Compound Interest Comparison Calculator to see how your investments grow over time and understand the power of compounding.
Minimise Fees
Use the ETF vs Managed Portfolio Fees Calculator to see how fees impact your long-term returns and find the most cost-effective investment approach.
Stress-Test Your Strategy
Use the Safe Withdrawal Rate Stress Tester to see how robust your portfolio is under different market conditions and withdrawal rates.
Start with these popular calculators
These six tools are the best starting point for understanding your investment options. They help you compare accounts, understand compound growth, calculate fee impacts, and see how different strategies affect your retirement timeline.
Cash ISA vs Stocks & Shares ISA Calculator
Compare Cash ISAs and Stocks & Shares ISAs to see which better supports your retirement goals. Model growth rates, risk levels and tax efficiency over time.
Lump Sum Investment Calculator
Calculate how a lump sum investment grows over time. Model different investment scenarios, growth rates and time horizons to see the potential returns on a one-time investment.
Compound Interest Comparison Calculator
See how compound interest grows your investments over time. Compare different contribution levels, growth rates and time horizons to understand the power of compounding.
Safe Withdrawal Rate Stress Tester
Test how robust your portfolio is under different market conditions and withdrawal rates. See how sequence risk and market volatility affect your retirement sustainability.
ETF vs Managed Portfolio Fees Calculator
Compare the long-term cost of ETFs versus managed portfolios. See how fees impact your returns and understand the true cost of different investment approaches.
Cash vs Investing Opportunity Cost Calculator
Calculate the opportunity cost of keeping money in cash versus investing it. See how much potential growth you’re missing by holding cash and understand when cash makes sense.
Getting Started with Investment & Portfolio
New to investment planning? Follow this step-by-step guide to start understanding your investment options and building an optimal portfolio.
- Compare investment accounts – Use the Cash ISA vs Stocks & Shares ISA Calculator to see which better supports your retirement goals.
- Understand compound growth – Use the Compound Interest Comparison Calculator to see how your investments grow over time.
- Calculate fee impacts – Use the ETF vs Managed Portfolio Fees Calculator to see how fees affect your long-term returns.
- Model lump sum investments – Use the Lump Sum Investment Calculator to see how one-time investments grow over time.
- Stress-test your strategy – Use the Safe Withdrawal Rate Stress Tester to see how robust your portfolio is under different conditions.
- Refine your strategy – Use other calculators to understand opportunity costs, tax drag, and how investment decisions fit with pensions, ISAs, and your overall retirement plan.
All Investment & Portfolio calculators
Browse all Investment & Portfolio calculators. These tools help you compare investment options, understand compound growth, calculate fee impacts, and see how different portfolio strategies affect your retirement timeline.
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Lumpy Returns Calculator (UK Specific)
What is the Lumpy Returns Retirement Calculator? The Lumpy Returns Calculator helps you understand how real-world, non-linear investment returns affect the growth of your pension, ISA, GIA and Buy to Let equity. By modelling a realistic series of volatile returns next to a smooth average return, it shows how the…
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Bridge to Retirement Calculator (UK)
How much money do you need to bridge to retirement? Discover how our interactive tool can help you map out exactly how long your savings will last and how much you need to earn to get to retirement. This is specific to the UK market. How the Calculator Works? Understand…