Your account balance is not what you can spend. It includes rent that hasn’t left yet, a card bill that’s coming, and the grocery money for the rest of the month.
Safe to spend is the number after all of that: what’s genuinely flexible today.
How It’s Calculated
Spendly takes the headroom left in your spending budgets — what you’ve allocated, minus what you’ve actually recorded — and divides it across the days remaining in the month.
That’s it. It’s deliberately simple, because a number you don’t understand is a number you won’t trust.
- Built only from your budgets and the transactions you’ve recorded
- Calculated per currency — never summed across currencies
- Accounts for seasonal overrides and rollover, so a month where you deliberately budgeted more shows more
- Updates as you record spending
Why It’s Never Blended Across Currencies
If you have €300 of headroom and £200 of headroom, there is no single honest “safe to spend” figure. Adding them means picking an exchange rate and pretending the euros are spendable in a British supermarket.
Spendly shows one figure per currency. Slightly less tidy, considerably more true — and if you live between two countries, it’s the difference between a useful number and a fictional one.
A number you can trust at a glance
Every figure carries the date of the most recent transaction behind it, so you always know how current it is. If your data hasn’t caught up in a week, Spendly says so rather than quietly serving you a stale number.
That’s what makes it usable without thinking. You can act on the figure at the till, because on the rare occasion it isn’t current, it tells you.
How to Actually Use It
Check it before a discretionary purchase, not after. That’s the entire workflow.
The value isn’t precision — it’s replacing “I think I’m probably fine” with an actual figure, at the moment you’re deciding. Most overspending isn’t a budgeting failure, it’s an information failure at the till.
If you want the same idea projected forward instead of for today, that’s the cash flow forecast. If you’d rather allocate money up front than check a number, use envelopes.