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Construction Loan Calculator

Planning your next build's budget? Our building finance calculator helps you see a clear repayment schedule based on your costs in under 60 seconds.

  • 100% free
  • No Credit Score Impact
  • Instant Results

Construction LoanCalculator

Enter construction details

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Construction Loan Summary

Total Project Cost
$740,000.00
Total Loan Required
$640,000.00
LVR ⚠
86.49%
Interest During Construction
$20,800.00
Monthly P&I Payment
$4,090.96
Total P&I Repayments
$1,423,654.45
Total Financing Cost
$804,454.45

MilestoneDraw Amount ($)Cumulative Drawn ($)Monthly Interest ($)
Foundation / Slab40,000.0040,000.00216.67
Frame60,000.00100,000.00541.67
Lock-up140,000.00240,000.001,300.00
Fix-out100,000.00340,000.001,841.67
Completion60,000.00400,000.002,166.67

How to Use Your Financial Blueprint and Building Calculator

We've designed this budget planner to be your project's financial command centre. It turns your numbers into a clear repayment schedule, helping you replace guesswork with a solid strategy for your building finance. Use this tool as a powerful cost estimator for your planning. Your final loan term will be confirmed by a lender based on your full profile.

Tips for a More Accurate Project Budget
  • Plan a Contingency Budget:  It's wise to add 10 to 15 percent to your total cost as a contingency fund for any surprises on site.
  • Align with Milestone Payments:  Funding is often released in stages. Planning your repayments around each progress payment helps with cash flow management for your project.
  • Precise Costs Help:  The more accurate your cost estimates are, the clearer your financial picture and drawdown schedule will be.

Your Guide to Commercial Construction Loans

Let's walk through how this type of finance works. Unlike traditional home loans, it is different from a standard business loan, and understanding its staged funding structure is key to managing your project's cash flow effectively.


What is a Construction Loan?

Think of a construction loan not as a single lump sum, but as a drawdown facility engineered specifically for a construction site. Instead of receiving all the money at once, the funds are released in stages. These progressive drawdowns are timed to match your project's key milestones. For example, a drawdown might be approved after site preparation costs are covered, another once framing is complete, and so on. Before releasing each progress payment, a lender will often require a certified progress report from a quantity surveyor to verify that the work has been completed to standard.


The biggest advantage is that you only pay interest on drawn funds.  Your interest rate will depend on the lender. This keeps your costs low and means you aren't paying interest on a large, unused loan balance. This makes it a powerful cashflow solution designed to fit the rhythm of a project. Many options have an initial interest-only period during the building phase.


What are the benefits of a Construction Loan?

  • Improved Cash Flow Management:  You are not paying interest on a large, unused loan. This keeps your costs low during the initial phases of the build and prevents you from tying up capital unnecessarily.
  • Access to Larger Capital:  Commercial construction loans are purpose-designed for high-cost undertakings, providing access to significant capital that standard business finance or even some home loans might not cover.
  • Accountability and Security:  The staged process and need for quantity surveyor inspections give both you and the bank confidence that the project is progressing as planned. It ensures funding is allocated correctly at every phase.

Understanding Your Construction Loan Payments

With a construction loan, your loan payments are calculated differently. During the construction phase, you typically pay interest only on the amount you have drawn down, not on the total loan amount. Once the building is complete, the facility may convert to a principal-and-interest repayment structure. Understanding this process can help you save money and manage your cash flow effectively.


What Can This Type of Funding Cover?

A construction loan is designed to cover all the key expenses associated with a build, from land acquisition finance to final fit-out funding:

  • Acquiring the land for your new development project
  • Site preparation, materials, and labour costs
  • Paying contractors, architects, and council approval fees. Ensure you account for any application fee.
  • Funding a complete office, retail, or workshop fitout
  • Large-scale renovation finance

How a Lender Reviews Your Plan for Approval

To get your plan approved for builder finance, lenders need to feel confident in both your plan and your ability to execute it. They typically look at a few key areas:

  1. The Plan:  This is the most critical part. Lenders will want to see detailed architectural plans, council approvals, a fixed price building contract, and realistic cost estimates. A clear, well-researched plan shows them you have minimised risk and have accounted for the total funds required.
  2. Your Experience:  Your track record in the industry is very important. Showing successful past projects gives them confidence in your ability to manage the build and deliver it on time and on budget.
  3. Your Financial Health:  This includes your business's trading history (usually at least six months with an ABN), your revenue, and your credit history. Strong, consistent cash flow is vital as it demonstrates you can manage the project's finances.

Our role as your partner is to make this process clearer. Our system reviews your project's profile and matches it with a traditional or alternative finance lender whose criteria best fit your circumstances, guiding you to the highest chance of a successful outcome.

Turn Your Blueprint into a Funded Reality

With access to over 80 lenders and a streamlined process for development finance, Lend can connect you with the right commercial property finance to get your project off the ground. Start your application today to see your options.

This process will not affect your credit rating in any way.