Should I use a personal loan or add to my mortgage for renovations?

Personal loans are simpler for amounts under $50,000 - faster approval, no valuation costs, and you keep mortgage intact. For larger amounts ($50,000+), a mortgage top-up usually has lower interest despite higher setup costs.

How much should I budget for renovation contingency?

At least 15% for straightforward projects, 20%+ for structural work or older homes. Renovations almost always cost more than quoted due to unforeseen issues.

Do renovations increase property value enough to justify borrowing?

Some do: kitchens and bathrooms typically return $1.50-2 for each $1 spent. However, cosmetic upgrades like paint and landscaping often give better returns than structural changes. Over-customization can actually reduce appeal.

§ Tool · tier 1 · independent

Home Renovation Loan Calculator.

Calculate personal loan financing for home improvements without touching your mortgage

CalculatorFree, no signupOn-deviceupd May 2026

Inputs

Your numbers

Awaiting inputs

Move the sliders or type in the form on the left — the math updates live as you go. Click Get AI verdict when you want a written analysis.

Want to renovate without refinancing your mortgage? A personal loan can be perfect for smaller to medium renovations. This calculator helps you plan the financing and understand the true cost of upgrading your home.

§ Worked examples

Real-world scenarios

Kitchen Upgrade

Sarah wants a $20,000 kitchen renovation and has $5,000 saved. Her property is worth $550,000.

Inputs

cost:20,000savings:5,000contingency:15

With 15% contingency, she needs an $18,000 loan. The kitchen reno could add $35,000-45,000 in value - good return on investment.

Bathroom Renovation

Mike needs $12,000 for a bathroom update, no savings, property worth $420,000.

Inputs

cost:12,000savings:0contingency:10

A $13,200 loan over 3 years at 11% costs $431/month. The bathroom could add $18,000-22,000 in value if done well.

§ FAQ

Questions Australians ask

§ Glossary

Plain-English definitions

Contingency Budget

Extra funds set aside for unexpected renovation costs - typically 10-20% of the project budget.

Over-Capitalizing

Spending more on renovations than the value they add to your property.

Value-Add Renovation

Improvements that increase your property's market value by more than they cost.

§ Pair it with

Related tools

Personal Loan Calculator

Calculate exact repayments for your renovation loan

Secured vs Unsecured

See if securing reduces your rate

Affordability Calculator

Check if you can afford the loan repayments

How to use

01Enter your estimated renovation cost
02Add a contingency buffer for unexpected expenses
03Include any savings you can contribute
04Set the loan rate and term
05Optionally add property value to see value-add potential

Key info

Personal loans work well for renovations under $50,000
No need to touch your mortgage or pay valuation fees
Faster approval than mortgage top-ups (often same day)
Interest rates are higher than mortgage rates but simpler

Pro tips

Always budget 15-20% contingency - renovation costs almost always blow out
Get multiple quotes from tradies before deciding on loan amount
Kitchen and bathroom renovations typically add the most property value
Consider a home equity loan if you need more than $50,000

Avoid these

Underestimating renovation costs and running out of funds mid-project
Not factoring in temporary living costs if the renovation is major
Choosing the longest loan term without calculating total interest
Over-capitalizing - spending more than the value it adds to the property

Disclaimer: Estimates only. Interest rates, fees and policies change frequently. Always verify with lenders directly. General information, not personal financial advice.

Last updated · May 2026