Irish Taxes, Pay & Household Money — Calculated Instantly.

Open-access, with the working shown

• Sources and formulas you can read

  Read each model’s method, assumptions and reference sources. Tax models identify their supported years so you can check the working. Results are planning estimates, not advice or a filed return; Revenue and other official bodies remain the authority.

  Browse the calculators

• Private where it matters

  Calculator inputs are processed in your browser and are not sent to analytics or advertisers. Messages you send to Summy are transmitted to be answered, optional account uploads are encrypted before sending, and site analytics are described in our policy.

  Privacy policy

• Offline web app

  Download the offline pack and supported local calculators and guides can run without a connection. It is a web app saved by your browser, not a native app; chat, account features and later updates need a connection.

  Set up offline use

Recent practical guides

• Budget 2027 Tax Calculator & Changes: Complete PAYE Guide

  Understand announced PAYE bands and credits, compare supported salary scenarios, and separate Budget proposals from confirmed payroll rules.

• Capital Gains Tax Drops to 31%: Complete Guide

  Revenue confirms 31% for most gains from 7 October 2026. Learn the date rule, chargeable-gain calculation, exceptions and payment versus filing obligations.

• Help to Buy Scheme 2027: How to Get up to €35k Deposit Relief

  Understand Revenue’s €35,000 HTB cap, qualifying dates, three-way calculation and first-time-buyer conditions before planning your deposit.

All published articles