Choose a period and a boundary
Use one period for the example, such as the month you are planning. Decide whether you are recording all household income or only the amounts each person contributes to shared costs. These are different totals and should not be mixed. Write the boundary at the top of the plan so both people interpret the same numbers.
List shared expenses without counting them twice
Enter shared bills and estimates once, even if one person pays the provider and the other later contributes. Keep a transfer between your own planning accounts distinct from a new expense. For variable categories, label the planned figure as an estimate and replace or compare it with actual spending later.
Agree on contributions and responsibilities
Choose an arrangement together and record who updates each category. This worksheet does not choose a fair contribution rule for you. If the planned contributions do not cover the shared expenses, the difference is something to discuss before assuming that one person will supply it.
Review the plan against what happened
Compare planned and actual spending for the same period. A difference may reflect timing, an omitted bill, or a changed estimate. Use a notes column to explain it. Keep the shared plan focused on organizing information; decisions about tax, debt, ownership, or legal arrangements require their own appropriate guidance.
A shared-cost plan
Original hypothetical example
All values below are invented monthly USD amounts. Agreed contributions total $2,000. Planned expenses total $1,700, leaving $300 unallocated. Actual expenses total $1,750, leaving $250. These differences do not include either person’s private spending and are not instructions for how to use the remainder.
| Shared category | Planned | Actual |
|---|---|---|
| Housing | $1,000 | $1,000 |
| Food | $400 | $450 |
| Transport | $200 | $180 |
| Other shared costs | $100 | $120 |
| Total expenses | $1,700 | $1,750 |
| Unallocated difference | $300 | $250 |
Before relying on the totals
- Every row uses the same currency and period.
- Contributions are distinguished from complete household income.
- A shared expense appears once.
- Estimates are labeled and have someone responsible for review.
- Both people can access the current version.