Hello Judy!
Thank you for presenting a challenge for us to wrap our minds around...
The following is a snapshot of what appears to be the overall scenario (approximate costs) that you are working with:
- Purchase Price: $203,500
- Down Payment: $ 20,350 (10%)
- Loan Amount: $183,150 (90% LTV)
- 1st Payment Date: 01-March-2008
- MI Monthly Amount: $ 144
- MI Cutoff Date: 01-April-2015
- Current Balance: $179,433
- Current Value: $141,000
- Current Liquid Assets: $ 55,000 (=>3% yield potential)
In your brief description it sounds like you have excellent credit and that you can comfortably afford your current payments. While you do not specifically state what your motivation is to make a change from your current loan, it does sound like it is influenced by the desire to do the following:
- Remove MI from your payment (why pay MI when the home is currently worth less than what you owe?)
- Reduce your current mortgage payment (possibly to pay the difference to your principal each month and be debt free when you retire.)
- Reduce your principal below current market value (feeling of safety when you owe less than what your home is worth.)
While I agree with you that choosing a recast option (referenced below as Recast Option#1) is the mildly better choice from a logical and emotional point of view (about $2,200 savings over 5 years and a $1,000 cost over 10 years), when compared to a refinace, I am compelled to tell you that you should definitely consider two other options that cost less and save you more over the next 5, 10, 20, 30+ years.
- Recast Option#2: Paydown your current mortgage to $158,250 (78% LTV) which will only cost $22,000 and remove your MI. Payment= $911 ($287 mo savings)
- This will yield an actual cost savings of $26,500 in the first 5 years over your original choice (Recast Option#1) and allow you to keep $33k in savings.
- Take no action Option: Keep everything the same as you have now and maximize both your liquidity ($55k in savings) and tax deduction $1,200 extra per year.
- This will yield an actual cost savings of $37,500 in the first 5 years over your original choice (Recast Option#1) and allow you to keep $55k in savings.
You clearly seem to be concerned with your financial security in the future and are trying to make the best choice possible to help you achieve your goals. This is why I took the time to dig a little deeper into the numbers that you are analyzing to give you a chance to look at your position from another perspective. A perspective that takes both your short-term and long-term fiscal health and security into consideration is warranted for you at this point in your life. You should seriously consider the value and security that comes with keeping your cash liquid (in a savings/equity/annuity account) versus illiquid (as equity in your home) in the time of an economic recession and predicted 'slow' recovery. Any problems with health, employment, or natural disaster for you or a loved one could easily leave you in need of access to cash.
You should definitely consider seeking the advise of two or more Certified Financial Planner's, prior to taking any action that would see you moving money from your liquid reserve account(s), to a theoretical equity postion in a home that will most likely continue to decline in value before reversing the trend in the next 6-18 months simply to avoid an MI payment that you can afford to pay.
Realistically; the fact that you owe more than what your home is currently valued at is one of the primary reasons you should think long and hard about all of your options before you consider moving your money from a place that it can actually serve you when needed to a place that will never earn a return on investment... your home.
That's right... even when your home appreciates in value, your 'down payment' does not earn any interest, or rate of return, at all. It is important to understand that as of this moment, the $20k + that you 'invested' as a down payment is gone (a real cash loss). In addition; it will take approximately 20 years to recover this loss if your home begins appreciating from this point forward at a sustainable 3% growth rate (based on a current value of $141k). Any additional money that you 'invest' into your home to remove your MI and lower your payment comes at a very high risk of continued loss of equity (real cash loss), regardless of how short or shallow any remaining loss may be.
You should consider these two questions: "Do I believe it is safer to have my home paid for free and clear when I reach retirement?" or "Do I believe it is safer to have enough money in a secure and liquid account that allows me to pay off my home, if I want to, when I reach retirement?"
Congratulations on finding this forum and thank you for taking the time to post your question and seek the advice from a diverse group of dedicated professionals.
Have a Great Year, 
Richard