---
title: "ROI Calculator — Return on Investment with Annualized ROI"
description: "Calculate ROI and annualized return on any investment. Understand how US, UK, and other countries treat investment returns differently for tax purposes. Free, no ads."
url: "https://worldcalculators.org/calculators/roi/"
canonical: "https://worldcalculators.org/calculators/roi/"
---

# ROI Calculator

Calculate ROI and annualized return on any investment. Understand how US, UK, and other countries treat investment returns differently for tax purposes. Free, no ads.

## Quick answer

ROI math is universal — but how much of that return you keep after tax varies dramatically by country.

## How ROI Is Reported and Taxed by Country

ROI math is universal — but how much of that return you keep after tax varies dramatically by country.

## Frequently Asked Questions

Historically: global equities ~7–10% annualized, real estate 4–8% (plus leverage), bonds 2–5%, cash/savings 0.5–5% depending on rate environment. These are pre-tax returns — subtract your capital gains tax rate for your true after-tax ROI.
A UK ISA (Individual Savings Account) lets you invest up to £20,000 per year with all gains and income completely tax-free. A 10% gross ROI stays 10% net inside an ISA, versus 8.1% after the 18% CGT rate for basic-rate taxpayers outside an ISA.

## Sources & Methodology

ROI = (net gain ÷ initial investment) × 100; annualized ROI uses the CAGR formula. After-tax returns depend on each country's capital gains rules and tax-free wrappers (e.g. US Roth/401k, UK ISA, Canadian TFSA).

Source: https://worldcalculators.org/calculators/roi/
Markdown mirror of the HTML page. Prefer this URL for RAG; the interactive calculator still lives on the HTML page.