Calculator Hub — Every PennyWise Finance Calculator 2026/27

Every PennyWise Finance calculator

The full set of UK personal finance calculators on the site, grouped by what they help you decide. All calculators run client-side — your inputs stay on your device. All are updated for the 2026/27 UK tax year.

Savings calculators

• Savings Calculator — regular saving and compound interest
• Compound Interest Calculator — see how interest compounds over time
• Emergency Fund Calculator — 3, 6 or 9-month target sizing

Pair these with our Best Easy Access Savings Accounts UK comparison and the Best Cash ISAs UK pick.

ISA calculators

• ISA Calculator — project growth across Cash and Stocks and Shares
• LISA Penalty Calculator — model the cost of an early Lifetime ISA withdrawal
• Personal Savings Allowance Calculator — when to switch from savings into a Cash ISA

See the ISA Hub for the full ISA cluster.

Mortgage calculators

• Stamp Duty Calculator UK — first-time buyer, home mover and additional property bands
• Mortgage Overpayment Calculator — interest saved and years off the term

See the Mortgage Hub for the full mortgage cluster.

Tax and income calculators

• Take Home Pay Calculator — income tax, National Insurance, pension and student loan deductions
• Personal Savings Allowance Calculator

Retirement calculators

• Retirement Income Calculator — project pot, annual and monthly income, sustainable withdrawal

See the Pension Hub for the full pension cluster.

Where to hold your investments

For platform-led decisions covering ISA, SIPP and JISA in one place, see Best Investment Platforms UK.

How our calculators work

All calculations run entirely in your browser. Your inputs are never sent to a server. See About our calculators for the methodology and assumptions behind each tool. Every calculator is updated for the 2026/27 UK tax year. For broader context, every calculator carries an explainer section, worked examples and FAQs.