Why a rule of thumb is the wrong tool
Multiples of income are appealing because they turn a difficult question into arithmetic. The problem is that income is a poor proxy for need. Two households on identical incomes can have completely different answers if one supports a parent and the other has a child two years from leaving home.
A rule of thumb also ignores duration entirely, and duration is the single most influential input. A commitment with nineteen years left and one with four are not the same problem, however similar the monthly figure looks.
This article publishes no figures and no multipliers. What it offers is a method that produces an answer specific to your household, which is the only kind worth having.
Start with who depends on you

This is less obvious than it sounds. The people who depend on you are not always the people who live with you, and they are not always the ones you would list first.
Consider anyone whose day to day would change if your income stopped. That may include a partner, children, a parent you help support, a sibling, or somebody who relies on you for care rather than money. Care has a cost too: if you are not there to provide it, somebody is either paying for it or giving up their own time.
Write down how long, not just who
Beside each name, note roughly how much longer that dependence is likely to continue. A child of six is a question about the next twelve to sixteen years. A parent may be an entirely different horizon. That column does more work than anything else on the page.
Then list what continues regardless
Some costs stop if circumstances change. Commuting, childcare arranged around working hours, and a good deal of discretionary spending all fall away. Others continue exactly as before, and those are the ones that matter.
Commitments that usually continue
- Housing, whether a mortgage, rent, or a shared arrangement with family.
- Utilities and the insurance on a home and vehicles.
- Childcare or eldercare that would need replacing rather than pausing.
- Debt repayments, particularly anything with a co-signer who would inherit the obligation.
- Transport that somebody needs in order to keep working or studying.
- Regular support provided to somebody outside the household.
Rough monthly figures you are confident about are more useful than precise ones you had to guess at. The purpose is to make the picture concrete, not to produce an audit.
Name what you would most want to hold steady
This is the question people find hardest and the one that produces the most useful answers, because it is not about money. It is about what you would not want to change for the people who depend on you.
Staying in the same home. Staying at the same school. A partner not having to return to full time work immediately. A parent not having to move. Nobody having to make a decision in the first fortnight that they would regret later.
Almost every household has two or three things it would protect before anything else. Naming them turns an abstract figure into a specific question.
Once those are named the ambiguity largely disappears. You are no longer trying to work out a number in the abstract. You are asking what it would take to hold two or three specific things steady for a known length of time.
Subtract what already exists

Most households already have something in place and are unclear about what it is. Arrangements through an employer are the usual example: they exist, they are rarely read, and they often change when the job changes.
Two details matter more than the rest. When would it begin, and does it continue if the employment ends. Anything provided through an employer is tied to that employment, which is the gap people are most often surprised by.
If you cannot answer either question, that is a finding rather than a failure. It gives you something specific to check, and it is a far better use of a conversation than guessing on the call.
Putting it together
- List who depends on you, and for roughly how long each dependence continues.
- List the commitments that would continue regardless, with rough monthly figures.
- Name the two or three things you would most want to hold steady.
- Note what already exists, when it would begin, and whether it survives a job change.
- Write down what you could not answer. Those are the questions for the conversation.
That is a twenty minute exercise at a kitchen table and it requires no product knowledge at all. What it produces is not a final figure, and it is not meant to be. It is a description of your household precise enough that a conversation can be about your situation rather than about an average.
Where a conversation fits
A general, educational conversation takes those answers and explains how the relevant concepts work in plain language. It does not produce a recommendation, does not describe named products, and does not require you to change anything.
Consultations with Arsine are virtual, so both people in a two adult household can join from wherever they are. Where a decision genuinely involves two people, having both present tends to surface disagreements early, which is considerably better than surfacing them late.
Build the estimate in separate time periods
A single total can hide the fact that household responsibilities end at different times. Immediate transition costs may last for months, childcare may last for years, a mortgage follows its own schedule, and support for another adult may have no fixed end date. Breaking the estimate into periods makes assumptions visible and reduces the temptation to treat every dollar of expense as permanent.
Immediate transition
List expenses and income disruption that could arise during the first weeks and months, including time away from work, travel, arrangements, professional help, childcare changes, and bills that continue before longer decisions are made. Keep this category separate from long-range income support so it can be reviewed on its own evidence.
Medium-term adjustment
Consider the years when housing, childcare, education, caregiving, debt, and reduced survivor work capacity may overlap. Do not assume the survivor immediately earns more, moves, sells property, or receives every expected resource. Record more than one realistic scenario and explain which one the household prefers to preserve.
Longer responsibilities and existing resources
Identify obligations that could continue longer, then compare them with resources genuinely available for that purpose. Liquid savings, workplace benefits, retirement accounts, property, and business interests do not have the same timing or purpose. Ask qualified professionals about taxes, access, legal ownership, and other consequences before subtracting them from an estimate.
Review checklist
- Immediate transition period
- Childcare and dependent time horizons
- Housing and debt schedules
- Survivor income and care capacity
- Resources grouped by liquidity and purpose
- Assumptions dated for future review
Key takeaways
- Multiples of income describe an average household, not yours, and ignore duration entirely.
- Start with who depends on you and for how long. That column does most of the work.
- List only the commitments that would continue regardless. The rest is noise.
- Name the two or three things you would most want to hold steady.
- Check whether anything existing is tied to a job rather than to you.
- What you cannot answer is a finding. Take those questions to the conversation.
Frequently asked questions
Is there a standard multiple of income I should use?
Rules of that kind are popular because they are easy to remember, but income is a poor proxy for need and the approach ignores how long each commitment has left to run. Working from who depends on you and what continues regardless produces an answer specific to your household instead.
Question 1Do I need exact figures before a conversation?
No. Rough monthly figures you are confident about are more useful than precise ones you had to guess at. Gaps in your own knowledge are useful too, because they give the conversation something specific to work on.
Question 2Is life insurance appropriate for every household?
No. It depends on whether anyone relies on your income or your time, and for how long. Some households conclude that their position is already solid, and establishing that is a legitimate outcome of a conversation rather than a failed one.
Question 3What if my partner and I disagree about the answers?
That disagreement is worth surfacing before a conversation rather than during it. Where a decision involves two people, both are usually better off joining. Virtual consultations make that straightforward even when schedules do not align.
Question 4