MONEY · SAVING
“How much should I save a month” has no answer in percentages
The question assumes one destination. There are three, they do not pay the same, and the order you fill them in is worth more than the amount you put in.
By the Yoseri News desk · · 5 min read
"Ten per cent." "Twenty." "As much as you can." You have had these answers, and none of them helped — because the question is badly put. Saving is not one gesture, it is three, and they do not pay the same at all.
The starting point
$2,900 net a month. Your essential spending — housing, groceries, transport, insurance, phone — is $2,100. You are left with $800.
So the question is not "how much". It is: where do the $800 go, and in what order?
The three destinations, and what they pay
| Destination | What it pays | Guaranteed? |
|---|---|---|
| Paying down the card at 19.99% | 19.99% | Yes, and tax-free |
| The cushion, at 3.10% | 3.10% | Yes |
| Investing | Hoped for, never promised | No |
Only one of these three returns is both high and certain. Paying down a balance at 19.99% is banking a guaranteed 19.99%: no reasonable investment offers that, and none guarantees it.
Which ought to end the debate, except that a cushion is not measured in return. It is measured by what it prevents: without it, the next unexpected bill goes back on the card, and you pay 19.99% again on what you had just cleared.
What each step gives, in months
| Step | Target | At $800 a month |
|---|---|---|
| 1. One month of cushion | $2,100 | 2.6 months |
| 2. Clear the card | $1,240.60 | 1.6 months |
| 3. Take the cushion to three months | $4,200 | 5.3 months |
A little over nine months to be in order. And once step three is reached, your $800 represent a savings rate of 27.6% — a figure you would never have dared aim at starting from a percentage.
That is the reversal: the percentage is not what you decide, it is what you observe once the order is respected.
What this plan does not decide
The size of your cushion. Three months is a marker, not a rule: a steady job and a flat you can leave do not call for the same amount as contract income. Our breakdown on the safety cushion shows why "three months" is a lazy answer.
The trade-off between repaying and investing, when the debt is cheap. At 19.99% there is no debate; at 5.45% on a student loan there is a real one, and it is yours. Our short piece on opportunity cost sets the two figures side by side without settling it.
And nothing to do with choosing an investment. Yoseri is registered as an adviser with no market authority: we show what rates pay, never what to buy.
And for you, what does that mean?
Three subtractions, in this order. Your net income minus your essential spending: that is your real surplus. Your surplus divided by one month of spending: that is the number of months before you have a first cushion. The balance of your most expensive line divided by that same surplus: that is the number of months to clear it.
Three numbers, and your plan is written. Yoseri’s Savings and goals page works them out on your real transactions and dates each step.
Where the figures come from
The maths in this article starts from the assumptions written above. Run them again with your own figures — you should land on the same numbers.
Yoseri News is an educational publication. Nothing in this article is investment advice, a recommendation to buy or sell, or tax advice. Yoseri is registered as neither an adviser nor a dealer with any market authority.