UK NS&I Savings Calculator

Calculate returns from National Savings & Investments products including Premium Bonds, NS&I savings accounts, and fixed-rate savings. Compare NS&I rates against market alternatives.

Overview

The Ns I - UK helps you make informed financial decisions in UK. This calculator provides accurate calculations based on current rates and regulations in UK. Whether you're planning your finances, comparing options, or making investment decisions, this tool gives you the insights you need. Simply enter your details and get instant, detailed results with clear explanations.

How to use this calculator

Enter your information in the 4 input fields below
The calculator will validate your inputs in real-time
Click "Calculate" to see your results
Review the detailed breakdown of calculations
Adjust any values to see how they affect your results

Example calculations

Example 1: Basic Calculation

A typical scenario using default values

{
  "initial_deposit": 5000,
  "monthly_contribution": 200,
  "interest_rate": 4,
  "years": 10
}

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