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UK Tax Year 2025/26

Financial tools built for UK high earners

Navigate complex tax rules, optimise your income, and track your wealth with precision. No spreadsheets required.

The complete toolkit

Four powerful tools designed to help you make informed financial decisions. Built with UK tax rules and high earner scenarios in mind.

Income Optimiser
Model tax implications, pension contributions, and salary sacrifice to maximise your take-home pay.
  • Pension taper calculator
  • Salary sacrifice modelling
  • Effective tax rate analysis
  • Scenario comparison
Coming Soon
Self-Assessment Tracker
Organise income sources, expenses, and reliefs to simplify your tax return preparation.
  • Income categorisation
  • Expense tracking
  • HMRC-aligned checklists
  • Document storage
Coming Soon
Asset Optimiser
Compare mortgage strategies against investments to make data-driven decisions on your wealth.
  • Overpayment vs investing
  • Interest rate modelling
  • Net worth projections
  • Strategy comparison
Coming Soon
Wealth Tracker
Track your net worth and progress toward financial independence with UK-specific calculations.
  • Asset & liability tracking
  • FIRE calculator
  • State pension integration
  • Progress milestones
Privacy by design

Your financial data never leaves your device

We know you are entering sensitive information. Here is exactly how we protect it — and why you can verify it yourself.

Calculated in your browser

Every calculation runs in JavaScript on your own device. Your salary, pension contributions, and family details are processed locally — not transmitted anywhere.

No server receives your data

There is no API endpoint that receives your financial inputs. When you type a number, it goes straight to the calculation engine inside your browser tab.

No database, no storage

We do not store anything you enter in any database. Your scenario data exists only in your browser's memory and disappears when you close the tab.

What we do collect

If you subscribe to our mailing list, we store your email address. We also receive anonymous Vercel page statistics such as view count. No financial data is ever collected.

Read our Privacy Policy for full details.

Stay informed

Get notified when new tools launch and receive updates on UK tax changes that affect high earners.

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