What is the best way to determine if you should refinance a mortgage?
See the Mortgage Professor's calculators (#3). Go to bankrate and look up rates so you know what to punch in to those calculators. Our mortgage provider actually took the initiative to send us a refinance package with no closing costs to us and nothing added to the note; took us from a 30-year-fixed ~6.5% note to a 15-year-fixed ~5% note, and dropped the monthly payment in the process.  You might talk to your existing lender to see if they would do something like that for you; it gives them a chance to keep your business, and it cuts your costs. Yes, take the new rate, but instead of using the new 30 year term, calculate the payment as though the new mortgage were at the remaining term. 3 years into a 30? You calculate the payment as if the new mortgage were 27 years.  This will tell you what you are really saving. Now, take that savings and divide into your closing costs if any. That will give you the break even. Will you be in the house that long?  If you can find a no closing cost deal, it's worth it for even 1/8% savings.
There is one basic principle to apply here:  to compare money paid at different times, all the amounts must be compounded or discounted to the same point in time. In this case, the moment of the initial  $225,000 loan is convenient. At that moment, you get $225,000 You then make 30 payments on the 40% mortgage.  The amount of these payments has to be calculated;  they're paying off a $90,000 mortgage with 30 monthly payments at a monthly rate of 0.5% Finally, you make 30 payments of an amount X, starting one month after the 40% mortgage ends. So far we've just listed the amount and time of all the payments back and forth. A time-line type diagram is a huge help here. Finally, use compound interest and annuity formulas to bring all the payments to the starting point, using an interest rate of 1% a month! Equate money in with money out and solve for X You can choose to pay your mortgage instead of another bill, or vice versa.  Your net will change from month to month while your gross is relatively static. I can make a bunch of promises to my load officer about my expenses, but it is very difficult to verify.  Moreover, it is pretty hard to give your net income and plan for emergencies. So for the sake of reliability, verifiability, and general ease a lender will look at your gross. YOU should definitely look at your net when deciding if you can afford a loan. "The usual rule of thumb is that you should start considering refinance when you can lower the effective interest rate by 1% or more. If you're now paying 4.7% this would mean you should be looking for loans at 3.7% or better to find something that's really worth considering. One exception is if the bank is willing to do an ""in-place refinance"", with no closing costs and no points. Sometimes banks will offer this as a way of retaining customers who would otherwise be tempted to refinance elsewhere. You should still shop around before accepting this kind of offer, to make sure it really is your best option. Most banks offer calculators on their websites that will let you compare your current mortgage to a hypothetical new one. Feed the numbers in, and it can tell you what the difference in payment size will be, how long you need to keep the house before the savings have paid for the closing costs, and what the actual savings will be if you sell the house in any given year (or total savings if you don't sell until after the mortgage is paid off). Remember that In addition to closing costs there are amortization effects. In the early stages of a standard mortgage your money is mostly paying interest; the amount paying down the principal increases over the life of the loan. That's another of the reasons you need to run the calculator; refinancing resets that clock." Sounds fishy - taking out more debt to pay the main mortgage down faster? There are a couple of issues I can see: I would think that a much more sensible strategy with a lot less risk is to save up extra cash and send your lender a check every quarter or six months. I don't know any clever way to do what you're describing.  And, in a sense, you can see why there might not be one.  A mortgage isn't just a magical way to reduce your housing expenses; it's a tradeoff in which you agree to a long-term commitment in exchange for fixed costs (or at least costs with a prearranged structure) over that long term.  If you're unwilling to accept the obligation of paying for and maintaining the property over a long period, you can't really expect to reap the benefits of lowered costs.  Part of the reason people say buying is better is because people often do live in the same place for a long time, in which case, if they rent, they might miss out on savings they could have had if they bought instead.  If you're not going to live in the same place for a long time, buying may not actually be better for you. Start with the list of mortgage companies approved to work in your area. There are 80 within 10 miles of my house, and more than 100 in my county. Pick ones you know because they are established businesses in your area, region, or even nationally.   A good place to start might be with your current lender. The risk you seem to be worried about is a scam or a trick. In the recent past the scams were ones where the home owner didn't understand teaser rates, and the risk of interest only and pick-your-payment loans. The simpler the bells and whistles, the less likely you are to be embarking on a risky transaction. It can't hurt to ask an organization like the BBB or neighbors, but realize that many people loved their exotic mortgage until the moment it blew up in their face. So for 5 years your neighbor would have raved about their new mortgage until they discovered how underwater they were.  Regarding how smoothy the transaction is accomplished, is hard to predict. There is great variation in the quality of the loan officers, so a great company can have rookie employees. Unless you can get a recommendation for a specific employee it is hard know if your loan officer is going to give great service.   When getting a mortgage for a purchase, the biggest risk is getting a mortgage that results in a payment you can't afford. This is less of a risk with a refinance because you already have a mortgage and monthly payment. But keep in mind some of the monthly savings is due to stretching out the payments for another 30 years. Know what you are trying to do with the refinance because the streamlined ones cant be used for cash out. "When you refinance, there is cost (guess: around $2000-$3000) to cover lawyers, paperwork, surveys, deed insurance, etc. etc. etc. Someone has to pay that cost, and in the end it will be you. Even if you get a ""no points no cost"" loan, the cost is going to be hidden in the interest rate. That's the way transactions with knowledgeable companies works: they do business because they benefit (profit) from it. The expectation is that what they need is different from what you need, so that each of you benefits. But, when it's a primarily cash transaction, you can't both end up with more money. So, unless value will be created somewhere else from the process (and don't include the +cash, because that ends up tacked onto the principle), this seems like paying for financial entertainment, and there are better ways to do that." "It can be a good thing for the bank to refinance your loan for you - since you will be keeping the loan at that particular institution.  This gives them more time to enjoy the free money you pay them in interest for the remaining life of the loan. Banks that offer ""No closing costs"" are betting that mortgage payers will move their mortgage to get the lower interest rates - and whomever holds the loan, gets the interest payments." You would have to do the specific math with your specific situation to be certain, but - generally speaking it would be smarter to use extra money to pay down the principle faster on the original loan. Your ability to refinance in the future at a more favorable rate is an unknowable uncertainty, subject to a number of conditions (only some of which you can control). But what is almost always a complete certainty is that paying off a debt is, on net, better than putting the same money into a low-yield savings account. "This is obviously a spam mail. Your mortgage is a public record, and mortgage brokers and insurance agents were, are and will be soliciting your business, as long as they feel they have a chance of getting it. Nothing that that particular company offers is unique to them, nothing they can offer you cannot be done by anyone else. It is my personal belief that we should not do business with spammers, and that is why I suggest you to remember the company name and never deal with them. However, it is up to you if you want to follow that advice or not. What they're offering is called refinance. Any bank, credit union or mortgage broker does that. The rates are more or less the same everywhere, but the closing fees and application fees is where the small brokers are making their money. Big banks get their money from also servicing the loans, so they're more flexible on fees. All of them can do ""streamline"" refinance if your mortgage is eligible. None if it isn't. Note that the ones who service your current mortgage might not be the ones who own it, thus ""renegotiating the rate"" is most likely not an option (FHA backed loans are sold to Fannie and Freddie, the original lenders continue servicing them - but don't own them). Refinancing - is a more likely option, and in this case the lender will not care about your rate on the old mortgage." The reason for borrowing instead of paying cash for major renovations should be the same for the decision about whether to borrow or pay cash for the home itself.  Over history, borrowing using low, tax-deductible interest while increasing your retirement contributions has always yielded higher returns than paying off mortgage principal over the long term. You should first determine how much you need to save for retirement, factor that into your budget, then borrow as much as needed (and can afford) to live at whatever level of home you decide is important to you.  Using this same logic, if interest rates are low enough, it would behoove you to refinance with cash out leveraging the cash to use as additional retirement savings. For what its worth, I recently closed on a 30 year refinance mortage with an agent I found through Zillow.  The lender has a perfect 5/5 reputation score, whose office was located within 5 miles of my house, and as suggested by justkt on MrChrister's response, I checked out the business on the better business bureau and its online presence prior to going forward with the bank. The process was relatively painless, and the APR and closing costs were less than my previous loan with a federal credit union which I've used in the past.  I can't say if the bank I'll be using going forward is as good as the one I've used in the past, but overall I'm quite happy with it. I never met the individual in person but this saved both of us a fair amount of time honestly. I see your remarks regarding Zillow, but would add a question. Why not look only for recent sales? If you find homes similar to yours with recent sales, that's similar to how the appraisers do it. I've refinanced many times and each time, I looked at sales within three miles of my house. I hit the appraised price very close in my estimate, high or low compared to Zillow, but used transaction data from there.just my thought.  I chose a random neighborhood, and this was the first house I clicked. The main view shows last sale date, so I'd obviously suggest the OP look for more recent ones. If turnover is that low in his neighborhood, I understand, but the comment that transactions aren't listed is factually incorrect. I'd like my 2pts back. :) In the US, for most mortgages: The rules for how you compute LTV vary. Usually it's based with current value. With FHA loans, you cannot have the property re-assessed -- LTV is based on the original loan amortization. Note that in the wake of the housing crisis, assessors have suddenly become very conservative with valuations, so be prepared to fight over the valuation. It would depend on the health insurance that was being offered, and if it covers your family or just you. We pay around $500-600 for individual health insurance for our employees (families cost north of 1500 a month).  It's extremely expensive. Provide more details on the stock purchase plan as well (it sounds to me like in that case you'd only be getting for free what it would cost to purchase the stock... but that's only $10-15, so negligible in this case.)