For a buy-to-let mortgage, the minimum deposit is usually 25% of the property purchase price. However, this can vary between 20% and 40%. This percentage is different to a regular mortgage, where you’re often able to put down a deposit of as little as 5% of the purchase price.
The reason that deposits for buy-to-let mortgages are higher is because the loan is deemed riskier for the lender. That is, payments may be defaulted if the property isn’t the owner’s primary residence.
The maximum amount you can borrow on your buy-to-let loan is largely dependent on the amount of rental income you will be receiving. Usually, lenders need your rental income to be 25-30% higher than your mortgage payments.