Household cash buffer
If one income disappears, how long could your family cope?
To estimate how long your family could cope without one income, subtract the income that would still arrive from essential monthly spending. Then divide savings available for that gap by the positive monthly shortfall. This gives a rough cash buffer, not a forecast or an insurance entitlement. Set aside money already needed for upcoming bills and include any additional care or transport costs. Keep uncertain benefits out of the starting calculation. The cause of the lost income, its duration, existing policy conditions and the timing of any confirmed support can all change the picture.
Make the budget comparable before doing the division
Sorted's budget planner uses income available after deductions. Put both income and spending on the same monthly basis: use weekly figures multiplied by 52 and divided by 12, and annual bills divided by 12. Four weeks is not a full monthly average.
List the costs that would continue, those that could stop, and those that might increase. Childcare could rise if another adult takes on more work, or fall if arrangements change. Use a realistic adjusted budget rather than assuming the current total stays identical.
A cash-buffer worksheet
Write down the source and date of each figure. Keep the base case simple, then add a separate case for support whose amount and timing have been confirmed. The calculation below is an original planning worksheet, not a Sorted calculator or a recommended savings target.
| Step | What goes into the worksheet |
|---|---|
| 1. Essential monthly spending | Housing payments, food, power, transport, childcare, debt repayments and insurance premiums; add a monthly allowance for irregular bills. |
| 2. Remaining monthly income | Take-home pay and other income that would still arrive; allow for reduced hours or variable earnings. |
| 3. Monthly shortfall | Essential spending minus remaining income. Use the formula only when this number is positive. |
| 4. Available cash | Accessible savings minus amounts already reserved for bills or other commitments. Keep borrowing separate. |
| 5. Rough buffer in months | Available cash divided by the positive monthly shortfall. Changing costs or income will change the estimate. |
| 6. Separate confirmed-support case | Show the amount, start and end dates, conditions and written source; do not count the same money twice. |
- If there is no positive shortfall, the worksheet suggests no drawdown under those assumptions; it does not prove long-term security.
- If available cash is zero, this method shows no cash buffer. Look at immediate commitments rather than inventing a payment date.
- Check bills due before the next income date: an average can hide an earlier cash squeeze.
Check why the income stopped and what a policy actually covers
Illness, injury, a job ending and time away to care for someone are different situations. A policy name is not evidence that every loss of wages is covered. Sorted distinguishes income protection from death benefits and other personal cover; use your own documents to identify the insured event.
For any benefit you want to include, ask about the trigger, waiting period, benefit period, proof of earnings, exclusions, other-payment adjustments and the claim assessment process. A waiting period is not a guaranteed first-payment date. Keep a proposed or unassessed benefit out of the base budget.
Illustrative scenario: savings had two jobs
A household tests a temporary income interruption. Its first worksheet treats the entire savings balance as available, but some of it is earmarked for an annual bill. The household separates that commitment, updates the remaining income and asks for written employer-benefit and policy details. It compares an unconfirmed-support case with its cash-only starting point. The exercise assigns no claim, treatment or return-to-work outcome.
This illustrative scenario combines common questions and has no corresponding real client. Actual decisions and outcomes depend on personal circumstances, policy wording, underwriting and the insurer's decision.
Use the gap to prepare questions, then review the assumptions
Sorted recommends keeping emergency savings accessible and separate from everyday spending. A buffer estimate helps identify the period you would need to fund and which assumptions need confirmation. Revisit it when household costs, care arrangements, debt or employment change.
FMA describes insurance advice as a discussion of needs, premiums and policy terms. This worksheet is general information, not advice on a savings target, cover amount or product. Personal advice needs current written disclosure and an assessment of your circumstances. There is no promise of a price, acceptance, payment or processing time.
- Prepare a spending summary, debt repayments, current policy terms and written employment-benefit information.
- Record which funds are accessible and which are already allocated.
- Ask how the budget changes before support starts and after any benefit ends.
- Do not submit bank details, medical records, identity documents or full policies through the website form; confirm a secure channel first.
Four common questions
Can I divide savings by our current total spending? That ignores income still coming in and money already committed. Work out the adjusted shortfall first.
Does income protection cover any reason my pay stops? Do not assume so. Check the insured event and exclusions in the actual policy, including any conditions about losing a job.
Can I budget for payment as soon as the waiting period ends? Do not treat that as a promised payment date. Confirm the assessment requirements and timing with the insurer.
Does this give me a recommended number of months to save? No. It describes the resources and gap in your own assumptions. A suitable plan needs a wider assessment of responsibilities and risks.
Sources
- Sorted: budget planner (checked 8 October 2026 NZ)
- Sorted: emergency savings (checked 8 October 2026 NZ)
- Sorted: insurance types (checked 8 October 2026 NZ)
- FMA: insurance advice (checked 8 October 2026 NZ)
This article is general information only. It does not take your personal circumstances into account and is not financial advice.