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These days, as people scramble for new and more creative ways to finance buying a home, the interest only mortgage is becoming more common and well known. An interest only mortgage is one in which you have the option of paying only the interest (or just the interest and a portion of the principal) each month in the early years of the mortgage loan. Interest only periods may be applied to adjustable rate mortgages, or 30 year fixed rate mortgages, depending on the lender.

In a traditional mortgage, each month your mortgage payment is divided in two parts – one part is paid on the interest charge, the other on the principal of the loan. The main feature of an interest only mortgage loan is that during a specified initial period of time – usually three, five, seven or ten years – you may choose to make a payment of the interest portion of the loan only. The option is flexible. One month you may choose to make an interest only payment, another you may choose to make an interest-plus-part-of-the-principal mortgage payment, or a full, standard monthly mortgage payment. Needless to say, an interest-only payment will be significantly less than a traditional mortgage payment.

The flexibility of an interest-only mortgage allows you to adjust your mortgage cost on a month by month basis, giving you more control over your monthly cash flow. In any given month during the interest-only period, you have the flexibility to pay as much or as little on your mortgage as you can.

Interest only mortgages aren’t right for everyone. While you have the option of paying interest only each month during the early years, the principal repayment on your mortgage loan is accumulating. At the end of your interest only period, your mortgage payment will take a dramatic jump. Financial experts recommend interest only mortgages for specific types of borrowers: those whose income is supplemented by large commissions or bonuses throughout the year, those who can reasonably expect to be making considerably more income in a few years than they are now, and those borrowers who actually WILL invest the difference between their interest-only payment and their full mortgage payment in profitable investments.

The power of an interest-only loan, according to most experts, is that you can ‘afford to buy more house’. Because you’ll have the choice during the early years of paying only the interest each month, you can effectively afford the monthly payments on a house that’s as much as 30% more expensive than you could with an amortizing (typical) mortgage payment.

You also, however, have the choice each month of paying the interest plus as much on the principal as you wish. If you’re a salesman, for instance, whose standard income is supplemented quarterly and semi-annually by large commissions or bonuses, you could pay interest-only during lean months, saving yourself up to $350 in those months. In the months that you get a large commission though, you could choose to pay down several thousand dollars on the principal.

An interest only mortgage also makes sense if you have a solid investment plan. If a typical mortgage payment would be $900 monthly, and your interest-only payment for the month is $625, then the best financial strategy according to many financial experts is to invest the remaining $275 in a solid, money-making stocks program.

Interest only loans are not for everyone, but they can be a valuable financial tool that can help you control your spending and give your investment power some added oomph. Don’t rush blindly into an interest only mortgage, but do speak to a financial expert or loan officer about whether an interest only loan may be right for you.

Here’s the first mortgage term you should learn – Standard Variable Rate, or SVR. This is the interest rate you will be paying on the total amount you are borrowing. It is usually expressed as a percentage, and is different from an APR (Annual Percentage Rate). An APR includes all costs associated with the loan, such as interest, fees, any compulsory insurances etc.

While interest rates can vary quite widely across the board, all lenders will have a Standard Variable Rate. It’s the default rate for their mortgages, and can provide a good indication of whether they are offering good deals. Comparing different lenders’ SVRs is one way to get an idea of who has lower rates generally – though there will be exceptions to this rule.

This rate fluctuates, going up or down according to the economy and the lender. The biggest factor that effects SVRs is the Base Rate set by the Bank of England. In recent years this has been kept relatively low, and mortgage interest rates have been particularly good for borrowers. However, this could change and you should bear in mind that rates could go up in the future.

Many mortgages start off with special introductory rates, and then revert to the SVR after a set period. These include capped and collared mortgages. There are also ‘fixed rate’ and ‘interest only’ mortgages available, which are covered in more detail further on in the guide. When considering mortgages with special introductory rates, you should also take into account what the SVR is likely to be once your initial period is over. Many mortgages come with the condition that you stick with the same one for several years, even after the special offer period is over. There will often be penalties if you want to change mortgage within this tied period.

Interest calculation, interest charging

Be aware that there is a difference between interest calculation and interest charging. Some mortgages calculate interest daily, which works out as fairer for the borrower as your overall balance is reducing every month, and therefore the interest will be reducing too (even by a tiny fraction, every little helps!). Other lenders calculate interest monthly or annually, although annual calculation should be avoided if at all possible, as you will be paying the same interest for a whole year despite your balance having been reduced by your repayments. You should also ensure that your interest is charge in arrears, rather than in advance.