The buy-to-let specialist has also released a 70% LTV 2-year fix at 2.35%.
Both products come with a £2,495 completion fee, a free valuation for purchases and remortgages and free legals for remortgages.
Andy Young, chief executive at TBMC, said: “The 1.99% 2-year fixed product at 60% LTV has one of the lowest initial rates in the current buy-to-let mortgage market, and will be attractive to clients who have higher deposits for their buy-to-let properties.
“The current marketplace is very competitive and we have seen a number of lenders reducing their rates in recent weeks.
“This is a very good time for landlords to arrange fixed rate mortgages for their buy-to-let properties, especially with the expectation of rate rises next year.”
Paul Darwin, head of intermediary relationships at Skipton Building Society, added: “Skipton Building Society keeps a close eye on the buy-to-let market to ensure that its mortgage proposition for landlords remains competitive.
“We are delighted to team up with TBMC to distribute these new fixed rates which we have designed to meet the specific needs of landlords.
“2-year fixed rates are currently very popular and we are expecting a high demand for these new products.”