Title says it all... pretty much.
Maybe this exercise is really simple and this question a bit silly: I'd guess it's simply the sum of all expenses (i.e. expense accounts) over the sum of all income, per time period, e.g. per year (1 Jan - 31 Dec). But happy to get some ideas / comments on how to think about it / what steps are involved in establishing it via GnuCash...
What is the Savings Rate?
The savings rate is a measurement of the amount of money, expressed as a percentage or ratio, that a person deducts from their disposable personal income to set aside as a nest egg or for retirement.
In economic terms, saving is a choice to forego some current consumption in favor of increased future consumption, so the savings rate reflects a person or group's rate of time preference. The savings rate is also related to the marginal propensity to save.
The savings rate is the percentage of disposable personal income that a person or group of people save rather than spend on consumption.
- How exactly do I determine my savings rate?
- https://lists.gnucash.org/pipermail/gnucash-devel/2012-April/033843.html ("Savings Rate Report")
- https://news.ycombinator.com/item?id=12025912 ("your savings rate, as a percentage of your take-home pay")