How to plan for living on one income for a while

A stretch on one income is planned the way any known change is planned: in advance, from the income that will remain. Rebuild the shared budget on that income, find the gap each month, and fund the gap before the stretch starts from a set-aside built over the months before it, so the months on one income are paid from money that was put there for them. Two things are decided alongside the arithmetic: which shares change, since the partner without income cannot contribute proportionally, and which stay, which for most couples includes the partner without income keeping their own personal money. A six-month stretch whose gap reaches $1,450 a month is funded with about $6,000 set aside in advance, and the plan is what turns leave or a job gap from a strain into a schedule.

Why the plan is made before the stretch

The months on one income are also the months with the least time and the most change: a new baby, a job search, a course load. A budget rebuilt in the middle of them is rebuilt late, and the gap in the first month is found on a card. A plan made three to six months ahead finds the gap while both incomes are still arriving, funds it from those months, and decides the shares while nobody is tired.

Rebuild the budget on the income that remains

1. Write down the income during the stretch, month by month: the remaining paycheck, any partial pay from leave, any benefit, and the months each starts and ends.
2. Rebuild the spending for the stretch: the shared costs that continue, the ones that pause, and the new ones, a baby's first months or a tuition bill; see How to budget for a baby's first year for that case.
3. Find the gap each month, spending minus income, and add the months up.
4. Fund the total in advance, as a set-aside built by both partners over the months before, with a margin.
5. Decide the shares: how the shared costs are split during the stretch, and what each partner keeps as personal money.

A worked six months

Incomes are $4,200 and $2,800. Partner B's income stops for six months: three months of leave at 40% pay, $1,120, then three months at nothing. Household spending during the stretch is $5,650 a month, after pausing the savings transfer and the dining out and adding $450 of new costs.

The gap is $5,340 over the six months, and the couple sets aside $6,000 in the five months before, $1,200 a month split by their usual 60/40 rule, which gives a margin for a month that runs over. The set-aside pays each month's gap on the 1st, into the joint account, and the stretch runs on a budget that was fully funded before it started.

Decide which shares change

Proportional splits stop working when one income stops. During the stretch the shared costs are paid from the remaining income plus the set-aside, and the split is the household's rather than each partner's; see How to split shared bills fairly when incomes differ for the version that resumes after.

What stays is the personal money. The partner without income is on leave, between jobs, or in school, not on an allowance, and their personal money continues at the agreed figure from the household's funds. A couple that cuts one partner's personal money to zero during leave has decided that the leave is that partner's cost alone, which is rarely what either meant; see How much personal spending money each partner gets.

Watch the months, then resume

Each month of the stretch is read against the plan: the gap as planned, the set-aside's balance falling on schedule, and anything that ran over, which the margin covers. When the second income resumes, the pauses lift in order, the savings transfer last, once the set-aside is rebuilt or retired, and the split returns to proportional on the first full month of two incomes. See How to budget after a pay cut or a job loss for the case where the stretch has no known end, which is planned the same way with a runway instead of a total.

Common mistakes

• Planning after the stretch starts. The first gap lands on a card while everyone is exhausted.
• Keeping the proportional split. The partner with no income cannot pay 40% of the rent from nothing.
• Cutting the partner without income to no personal money. The stretch becomes one partner's cost alone.
• Funding the gap from the emergency fund. The stretch is known; the emergency fund is for what is not. Build a set-aside for it.
• Forgetting the new costs. A baby or a course adds lines the old budget never had.
• Skipping the margin. One month runs over in every plan.

Common questions

How do we budget when one of us stops working for a while? Rebuild the budget on the income that remains, month by month, with the costs that pause and the ones that start; find the gap for each month and fund the total in advance from a set-aside built over the months before; and decide the shares, with the shared costs paid from the household's money and each partner's personal money continuing.

Should the partner still working pay for everything? During the stretch the shared costs are paid from the remaining income plus the set-aside that both built, so both paid for it, in advance. The proportional split resumes when the second income does.

How much should we save before parental leave? The sum of the monthly gaps during the leave, plus a margin. Compute it from the leave's pay, the spending during the stretch including the baby's new costs, and the months; the worked example sets aside $6,000 for a $5,340 gap over six months.

What if the stretch is a job loss with no end date? Plan it as a runway rather than a total: the bare-bones budget on the remaining income, the monthly gap, and how many months the savings cover, reviewed every month. The set-aside becomes the emergency fund, which is what it is for.

Does the partner without income still get personal money? Yes, at the agreed figure, from the household's funds. The stretch is the household's, and the personal money is what keeps it from becoming one partner's sacrifice.

How Zypper handles this

Zypper lets the stretch's budget start on its first month. Change the income category for the stopped paycheck to its leave amount from that month forward with Apply to [month] forward checked, and to zero from the month the pay ends, and set the paused categories to $0 and the new ones to their amounts the same way, up to twelve months ahead; Left to budget, your expected income minus everything budgeted for spending, shows each month's gap as a negative figure before the stretch begins. The set-aside is a category that carries its balance with Roll over unspent budget, built by both partners' transfers into the joint account, which are recognized as movements between your own accounts, and each partner's own login shows the same plan. See Creating your budget, Rolling over unspent budget, and Inviting your partner or family member for the details, or get started with Zypper to see the six months before they start.