Tools to help your business. Mortgage calculator Enter the details for your mortgage below and press the calculate button. Mortgage amount (£): The mortgage amount required. Repayment period: The number of years for which the mortgage is taken out. Interest rate (%): The mortgage interest rate applicable. Calculate Note: These calculations are only for illustrative purposes and are not a substitute for professional advice. Can you claim R&D Tax relief? At DMA, we have a track record of helping clients with all R & D tax issues. We can advise you precisely on what does/does not qualify for tax relief under R&D activities and under which R&D scheme. Life’s too short to be searching for stuff… Fortunately, DMA’s App means that you don’t have to. Get ALL your financial and tax information in one place and at all times – plus a great financial news feed! Register With Us Get better and faster communication and a whole range of free tools. Track your mileage, upload bills directly – and get technology that’s as on-the-move as you are. Demystifying Digital Tax We’ll show you how to use Making Tax Digital to your commercial advantage by streamlining your business processes. Making Tax Digital can be an opportunity to save time and money!