Weighting Joint Contributions Means You Both Get That Raise
A topic that has the potential to be a source of trouble for couples is what to do when one of you gets a raise. Obviously both partners want to share the good fortune, but deciding how and where to allocate it between you may be hazardous to your marital harmony.
Fortunately the simple weighting mechanism used to figure out how much each of you should be contributing to the joint bills works just as well in reverse.
For example, let's say Jack currently earns $40,000 and Jill earns $50,000. That means for every $1.00 in joint ("needs") expenses, Jack contributes $0.44 (40/90) and Jill $0.56 (50/90).
Now Jill gets a big promotion that changes the relative weighting of their income, so that for each $1.00 in joint expenses, Jack's contribution falls to $.40, and Jill's rises to $.60. Jill has more in her paycheck each month, but that's been partially offset by an increase in her contribution to the joint expenses -- she doesn't get to keep all of her raise, since she now "owes" 7% more each month to the joint account. At the same time, even though Jack's pay stayed the same, he now "owes" 10% less to the joint expenses, effectively increasing his leftover ("wants") money.
Both Jack and Jill have more spending money, and there's no room left for argument.
