Estimate the interest cost of your construction finance before you start building.
We have whole of the market access allowing us to find our customers the best possible deal.
Construction finance has one quirk that catches a lot of self-builders and developers out: you don't usually draw the whole facility on day one. Funds are released in stages as the build reaches agreed milestones — foundations, wall plate, roof, and so on — and you only pay interest on what's actually been drawn down at any point.
That makes a construction finance facility genuinely cheaper in practice than its headline size suggests. The calculator below assumes full drawdown from day one, so treat its figure as a worst-case ceiling — your real interest cost will typically come in lower the more your drawdown is staged across the build.
Say you agree a £400,000 construction facility over 12 months, but the money is actually drawn in four £100,000 stages, roughly three months apart. You're not paying interest on £400,000 for the full year — you're paying interest on a gradually increasing balance, which can mean total interest well below what a full-drawdown estimate implies.
We'll model your actual drawdown schedule against the lenders on our panel when you're ready for a real quote, rather than relying on a worst-case ceiling.
Construction finance is usually released in stages as building work progresses, so you only pay interest on the amount actually drawn down at any time. This calculator assumes the full facility is drawn from day one, so it gives a worst-case estimate.
It gives an indicative estimate using simple interest on the facility size, term and rate you enter. Your actual cost depends on your drawdown schedule, the property, and the lender — use it for planning, then speak to us for a real quote based on your build programme.
No. It's a planning tool only and doesn't send us anything or commit you to a loan — use the enquiry form below when you're ready for a real quote.
