TermZero

UK Mortgage Intelligence • 2026 Fiscal Rates

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Property Price

The total purchase price of the property you intend to buy.

Deposit

The amount of cash you are putting down upfront. Typically at least 5% to 10% of the property price.

Home Value

The current estimated market value of your property. Lenders use this to calculate your Loan-to-Value (LTV) ratio.

Mortgage Balance

The total outstanding amount you currently owe to your existing mortgage lender.

Term (Years)

The total length of the mortgage. 25 years is standard, but many now opt for 30 or 35 years to lower their monthly repayments.

Mortgage Type

Repayment: You pay back both interest and the loan capital.

Interest Only: Your loan balance remains the same; you only pay the interest charges each month.

Initial Rate

The introductory interest rate for your mortgage (e.g., your 2 or 5-year fixed rate).

Fixed For

How long your initial interest rate is guaranteed for before it reverts to the lender's Standard Variable Rate (SVR).

Follow-on SVR

The Standard Variable Rate. The default, usually much higher interest rate your mortgage switches to after your fixed period ends.

Product Fee

An arrangement fee charged by the lender. You can add it to the loan or pay it upfront.

Fee payment option

Exit Penalty (ERC)

The Early Repayment Charge. The percentage your bank charges for leaving your fixed rate early.

Penalty payment option

Household Income

Your total pre-tax annual income. UK lenders typically cap borrowing at 4.5x your income.

Monthly Overpayment

Extra money paid towards your mortgage each month to reduce capital and save interest.

⚠️ Exceeds 10% annual limit

Compare with S&S ISA

See if you'd be richer by investing your overpayment into a Stocks & Shares ISA instead of paying off your mortgage early.

Offset Mortgage

If you have an offset mortgage, toggle this to calculate how your linked cash savings reduce your daily interest charges.

Expected ISA Return

The average annual compound growth rate you expect from your investments (historically 5-8%).

Offset Savings Balance

Enter the cash sitting in your linked savings account. The bank will subtract this from your mortgage balance before calculating your daily interest, saving you thousands.

Location

Stamp duty rules vary across the UK (SDLT, LBTT, LTT).

Buyer Status

First-time buyers get stamp duty relief. Additional properties incur a tax surcharge.

Annual House Price Growth

Your estimate of how much the property will increase in value each year.

Include Moving Costs

Conveyancing & Legal

Estimated solicitor fees to handle the property transaction.

Survey & Valuation

Estimated costs for the lender's valuation or a full structural survey.

Initial Monthly Payment

£0

Total Upfront Cash Needed: £0

The total physical cash required to complete this transaction (Deposit + Upfront Fees + Stamp Duty + Moving Costs).

LTV

Income Multiplier

0.0x

Stamp Duty

£0

Total Interest

£0

End of Fix Forecast

True Cost £0

The total amount you will pay out of pocket during your fixed period (Monthly Payments × Months + Upfront Fees).

Prop Value £0

The estimated value of your property based on the Annual House Price Growth you selected.

Future LTV 0%

Your estimated Loan-to-Value when you need to remortgage. Dropping into a lower LTV bracket unlocks much cheaper interest rates.

Built Equity £0

The estimated value of your property minus your remaining mortgage balance at the end of your fixed term.

Wealth Comparison: Overpay vs Invest

Guaranteed Interest £0 Saved

ISA Investment £0 Earned

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Amortisation Schedule

Year	Interest	Principal	Balance

£0

End of Fix Forecast

Wealth Comparison: Overpay vs Invest

Amortisation Schedule

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