Mortgages & MoneyLive

Mortgage Deposit Calculator

UK first-time buyers normally need 5–10% deposit. Bigger deposits unlock better rates.

Short answer

LTV (loan-to-value) is the loan ÷ property price. Lower LTV = better rate. The biggest jumps in rate are at 90%, 85%, 75% and 60% LTV thresholds.

Property

Property price

Deposit you have

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Calculation method, coverage and version

Inputs used: Property price, Deposit you have.
Calculation approach: The calculator applies the rules and assumptions described in “How it works” to the values you enter. Rounding can cause small differences from an official or provider calculation.
Coverage: Mortgages & Money. UK nations, tax treatment, local rules and provider criteria can differ; check the official sources shown below before acting.
Content version: No page-specific review date is currently published. Treat the result as indicative and verify current rules independently.

Not included unless explicitly requested: personal circumstances not entered, provider discretion, future rule changes, professional fees and case-specific exceptions. Read the full calculator methodology.

Primary sources and official verification

Use these official sources to verify current rules before acting. Coverage and dates can differ across England, Scotland, Wales and Northern Ireland.

See the sitewide source policy.

How it works

Deposit % = deposit ÷ price × 100. LTV = 100 − deposit %. Lenders price in tiers — pushing deposit just over a threshold (e.g. 25.1%) can save 0.2-0.5% on rate.

Worked example

£300k home, £30k deposit: 10% deposit, 90% LTV. To reach 85% LTV (better rates), need £45k deposit (£15k more).

Who should use this

•First-time buyers
•Home movers comparing deposit tiers

Common mistakes

×Forgetting upfront costs (stamp duty, legal, survey, moving)
×Maxing out the deposit and leaving no emergency fund

Frequently asked questions

Can I get a 100% mortgage?▾

A handful exist (e.g. Skipton Track Record) but most lenders want at least 5%.

Should I push for a bigger deposit?▾

Often worth it if it crosses an LTV tier — but keep 3-6 months of expenses in cash.

Related calculators

Mortgage Affordability →Stamp Duty →Mortgage Repayment →Amortization Schedule →