Building a Cash Safety Net Under Your Insurance

Insurance has gaps by design. Every policy makes you pay a deductible first, disability coverage pays nothing for its first weeks or months, and no policy at all pays you for losing a job. Cash fills those gaps. This chapter covers how big a cash reserve to hold, how to match it to the deductibles and waiting periods in your policies, how to keep planned costs from posing as emergencies, and where the money should sit.

The jobs cash does that insurance cannot

A cash reserve, usually called an emergency fund, does four things no policy does:

• Pays your share of insured losses. The deductible on a car claim, the out-of-pocket costs of a hospital stay up to your plan's maximum.
• Carries you through waiting periods. Most long-term disability policies pay nothing for the first 90 days or so. Social Security disability benefits, if approved, start only after a five-month waiting period.
• Covers the uninsurable. A layoff, a reduction in hours, a family member who needs help.
• Pays for the small losses you chose to keep. Chapter 1 argued for self-insuring small risks; this is the account that makes that safe.

Without cash, each of these turns into high-interest debt, and the debt outlasts the emergency. With cash, you can also choose higher deductibles and longer waiting periods, which lowers premiums on every policy you hold. Cash and insurance are a single system.

How big the reserve should be

Size the fund in months of essential spending, not income. Essentials are what you would still pay in a lean month: housing, utilities, groceries, transport, insurance premiums, minimum debt payments, phone and internet, and regular medical costs. Leave out what you would stop: dining out, travel, new clothes, extra saving.

How many months depends on how quickly income could stop and how long it might take to restart:

• Around three months for a household with two stable salaries in different employers or industries.
• Six months or more for a single earner, a household with dependents, or anyone in a field with long job searches.
• Nine to twelve months for the self-employed, commission earners, or anyone whose income swings from month to month.

The same essential spending of $5,000 a month leads to quite different targets. With two stable incomes, three months is $15,000, and a household with $6,000 saved is $9,000 short. With one income and children, six months is $30,000, and the gap is $24,000. Neither figure is a rule; what matters is that the reserve matches how fragile the income is.

A large target can take years to reach. Many people first build a small starter fund of a few weeks' essentials, enough to stop a car repair landing on a credit card, then clear high-interest debt, then keep building to the full target.

Match your cash to your deductibles and waiting periods

Your insurance choices and your reserve should be set together. Three checks:

1. Every deductible you carry should be payable from cash. If your auto deductible is higher than your savings, you are paying the lower premium without the cushion that makes it safe.
2. Your health plan's out-of-pocket maximum is the worst case for medical bills in one year. A reserve that covers it, or a health savings account that does (chapter 6), turns a medical crisis from a debt problem into a budget problem.
3. Your reserve should cover your disability policy's elimination period. If your long-term disability pays only after 90 days, three months of essentials is the minimum that bridges the gap, and more if you have no short-term disability or sick leave.

Once these line up, you can choose higher deductibles with confidence. Chapter 7 shows what that is worth.

Sinking funds: planned costs are not emergencies

Much of what people call an emergency is a predictable cost with an unknown date: a car that needs replacing, a roof near the end of its life, an annual premium, a dental crown. Paying for these from the emergency fund leaves it empty when a real emergency arrives.

A sinking fund is a separate pot for one known future cost, filled a little each month. Common ones:

• Car replacement and repairs, so the next car is bought with cash or a smaller loan.
• Home maintenance. A common planning guide is 1% to 3% of the home's value each year, more for an older home.
• Annual and semiannual bills: insurance premiums paid in full (often cheaper than monthly), property taxes, registrations.
• Medical costs up to your deductible, if you expect them.

Setting aside $300 a month for 5 years in an account earning 4.0% builds $19,854, of which $1,854 is interest. That money buys the next car outright or makes the loan much smaller, and the interest a loan would have charged stays with you instead.

Where the money should sit

Safety and access matter more than return. The fund should be in an account that cannot lose value and that you can reach within a day or two: a savings or money market deposit account at a federally insured bank or credit union, or very short-term Treasury bills for part of a larger reserve. Stocks are the wrong place, because markets often fall at the same time jobs disappear.

Within those limits, the interest rate is worth checking. Online savings accounts often pay several times what a checking account does, and Treasury bills are exempt from state income tax. The high-yield savings versus T-bill calculator compares them after tax. Keeping the fund at a different bank from your checking account adds a little friction that discourages casual spending.

Automation does most of the work: a transfer on payday into the emergency fund and each sinking fund, set once.

Keep it current

Review the reserve once a year and whenever essential spending changes by a meaningful amount: a new home, a child, a new car payment, or a change in income stability such as moving to self-employment. After you use the fund, refill it before you return to other goals.