Calculates monthly payment for various types of mortgage. To learn more about how the calculations are done, see amortizing loan.

Currently supported loan types

• 30 year fixed
• Others coming soon

Install the gem and add to the application's Gemfile by executing:

$ bundle add mortgagerb 

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install mortgagerb

require 'mortgagerb'

rate = 5.5
principal = 1000000
type = :thirty_year_fixed 

scenario = Mortgagerb::Scenario.new(principal, rate, type)
amortization_payment = scenario.calculate # 5677.89

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/serv/mortgagerb.

The gem is available as open source under the terms of the MIT License.