New build developers regularly offer incentives to attract buyers. These can be genuinely valuable, reducing your upfront costs, improving your mortgage terms, or adding to the property specification. But they also affect how lenders assess your application, and not always in the way you’d expect.
Understanding how incentives work and how they interact with your mortgage is important. The wrong combination of incentive and lender can cost you more than the incentive saves you.
Types of developer incentive
Incentives vary by developer and by site, but the most common ones fall into a few categories.
Cashback on completion is a lump sum paid to you after the purchase completes. It’s usually a fixed amount or a percentage of the purchase price. You can use it for anything: furnishing, moving costs, or simply keeping it in savings.
Stamp duty contributions are where the developer pays some or all of your stamp duty land tax. This reduces your upfront costs without changing the purchase price. You can check what stamp duty you’d owe using our stamp duty calculator.
Deposit contributions are offered by some developers in the form of adding to your deposit, effectively reducing your loan-to-value ratio. A lower LTV can mean access to better mortgage rates, but how lenders treat this varies, and that’s where things get more complicated.
Specification upgrades cover things like upgraded kitchens, flooring, or bathroom fittings at no extra cost. These don’t directly affect your mortgage, but they do add value to the property and reduce what you’d need to spend after moving in.
Legal fee contributions are where the developer covers some or all of your conveyancing costs. Like stamp duty contributions, this reduces your upfront spend without changing the mortgage itself.
How lenders view incentives
Here’s where it gets important. Lenders have rules about how much incentive a developer can offer before it affects the mortgage.
Most lenders cap total incentives at a percentage of the purchase price. The exact cap varies by lender. Some set it at 5%, others higher or lower depending on the LTV and property type. If the combined value of all incentives exceeds a lender’s cap, they reduce the property valuation by the excess amount. That means you’d need to borrow less or put down a larger deposit to make up the difference.
As an illustration: if you’re buying at £300,000 and the developer is offering incentives worth roughly 7% of the purchase price, a lender with a lower cap would only accept a portion of that and adjust their valuation accordingly. That changes your LTV calculation and can affect which rate you qualify for.
Some specialist new build lenders allow higher incentive levels than the mainstream names. This is one of the areas where working with a broker who handles new builds regularly makes a real difference, because they know which lenders work best with specific incentive packages.
Deposit contributions are treated differently
Not all incentives are equal in a lender’s eyes. Cashback, stamp duty contributions, and specification upgrades are generally straightforward. They sit within the incentive cap and don’t change the fundamental mortgage calculation.
Deposit contributions are trickier. When a developer adds to your deposit, some lenders treat that money as genuinely yours, reducing your LTV and improving your rate options. Others treat it differently, either ignoring it or adjusting their calculations to account for the fact that it came from the seller rather than from your own savings.
This distinction matters. If you’re relying on a developer deposit contribution to reach a better LTV bracket, say moving from 90% to 85%, you need to know that your lender will actually recognise it. Otherwise you might end up on a higher rate than you expected.
Your advisor will check this before recommending a lender. It’s one of those details that’s easy to miss if you’re arranging a mortgage yourself, but it can make a meaningful difference to your monthly payments. Our guide on new build deposits covers how deposit size affects your options more broadly.
Negotiating incentives
Developers expect negotiation. The incentive package advertised on the hoarding outside the show home is a starting point, not a fixed offer. What’s available often depends on how urgently the developer wants to sell, how far through the development they are, and what stage your particular plot is at.
Early in a development, incentives tend to be more generous because the developer wants to build momentum and show their investors that plots are selling. Towards the end, remaining plots may also come with better incentives to clear the site. Mid-development, when sales are steady, there’s usually less flexibility.
It’s worth asking about incentives you haven’t seen advertised. Some developers will offer stamp duty contributions or cashback even if they’re not publicly promoting them. Others will swap one type of incentive for another if it suits your situation better. For example, trading a specification upgrade for a deposit contribution if that improves your mortgage position.
Have this conversation with your advisor before finalising anything with the developer. What looks like the best deal on the surface might not be once you factor in how lenders treat it.
Incentives and the valuation
When the lender instructs a valuation, the valuer is aware of the incentive package. Their job is to assess whether the purchase price represents fair market value after accounting for incentives, or whether the price has been inflated to accommodate them.
With reputable developers this usually isn’t a problem, but valuations do occasionally come back lower than the purchase price. If that happens, your advisor will talk you through the options. Sometimes it’s a case of going back to the developer, sometimes a different lender takes a different view. Our guide to the new build mortgage process covers how valuations fit into the broader timeline.
Getting advice before you commit
The best time to discuss incentives is before you reserve a plot, not after. Once you’ve signed the reservation agreement, the incentive package is usually fixed. Understanding how each element affects your mortgage, and which lenders work best with the package on offer, gives you the information you need to make a good decision.
If you’re looking at a new build and want to understand how the incentives work with your mortgage, talk to one of our advisors. We work with new build buyers every day and can explain exactly how the numbers stack up for your situation.
