When the fixed rate period ends, you’ll usually be automatically transferred onto your lender’s standard variable rate, which will typically be higher than any special deal you’ve been on. At this point you’ll see your interest payments increase. However, you will be free to remortgage to a new mortgage deal, which may help keep your payments down.
If you are receiving any sort of financial assistance or even a financial gift for your down payment from someone make sure that you are depositing it into your account at least two months prior to applying for your mortgage. That way the bank will not need to source the large deposit. If this is not done then the gifter will have to write a letter stating that the money was truly a gift and not a loan. If you are needing a loan for the down payment the lender may see this as a sign of financial dependence and it may hurt your chances of obtaining a loan.

Taxes. You can usually choose to pay property taxes as part of your mortgage payment or separately on your own. If you pay property taxes as part of your mortgage payment, the money is placed into an escrow account and remains there until the tax bill for the property comes due. The lender will pay the property tax at that time out of the escrow fund.
Amortization. Each mortgage payment is split so that part goes to paying the principal and the rest goes to interest. In the early years of your mortgage, interest makes up a greater part of your overall payment, but as time goes on, the principal becomes a larger portion because you have a smaller amount of principal to charge interest against. Your lender will provide an amortization schedule (a table showing the breakdown of each payment).
Typically forbearance agreements have a deadline, after which the holder is expected to begin paying the monthly mortgage again, in full. In this regard, they are a sort of band-aid fix - great for emergencies, but no good if you expect that the emergency situation is going to become permanent. Once the forbearance period has expired, you have three courses of action:
Mortgage forbearance programs are offered by numerous lenders, including Bank of America, JP Morgan, Citibank, and Wells Fargo. Forbearance allows borrowers a temporary suspension of their monthly mortgage payments. So a homeowner will have time to explore their options, receive counseling, or modify their loan during this timeframe. In addition, a foreclosure on your home will not occur during the forbearance period. Learn more on mortgage forbearance.