The appliance, the trip, the new laptop — a big one-time purchase rarely breaks you
on its own. What matters is when it lands. The same $2,000 is comfortable in a
month with no large bills and tight in a month with three. Timing, not affordability,
is usually the real question.
Recurna Flow lets you drop the purchase onto your forecast at any date and see the dip it creates, so you can choose the week that leaves you steadiest — or confirm that waiting and saving first is the safer call.
How to think about it
- A one-time hit is about the trough, not the average. Your monthly average barely moves. What moves is the lowest point in the weeks right after the purchase. That dip is the whole decision.
- Timing is a free lever. Moving a purchase a few weeks — past a payday, before a quarterly bill — can change a tight week into a comfortable one at no cost.
- “Save first” has a shape too. Waiting is not just delay. It is more paydays banked before the hit. The forecast shows precisely how much steadier the later date is, so the trade-off between waiting and having is concrete.
Model it in Flow
You will drop the purchase onto the forecast as a one-time adjustment. Nothing here changes your real data.
- Open the Forecast page, set the account scope to the account you would pay from, and set the date range to Next 1Y.
- Open the simulation panel. The sidebar slides in and the URL gains
?sim=1. - Tap + to open the Add adjustment sheet. Choose Start from scratch.
- Pick the One-time type pill.
- Fill in the account, the amount of the purchase, a description, and the date you are considering buying.
- Tap Add. The forecast redraws with the purchase dropped onto that week.
Read the forecast
Look at the weeks just after the purchase date in the week-by-week breakdown. How low does your balance go, and how long does it take to recover? If the trough stays above your comfort line, the timing works. If it dips too far, the purchase is not unaffordable — it is just badly timed.
To choose between buying now and waiting:
- Build the purchase at the earlier date, then Save it as Buy now.
- Change the adjustment date to a later one — say three months out — or build it as a second saved simulation named Buy in 3 months.
- Tap Compare and select Baseline (no changes) to see the purchase against your untouched path, or select your other saved simulation to put the two dates side by side. The chart shows the week-by-week balance delta between them.
Now the choice is visual: the same purchase, two timings, and the exact difference in how thin each one leaves you. Pick the date whose trough you can live with.
Saving simulations and comparing them side by side are Pro features. On the free tier you can still build the scenario and read the effect on your 12-week forecast.
Exit simulation mode and your real forecast returns untouched. The purchase only happens when you decide the timing is right.
Want to test dates further out than 12 weeks? The unlimited forecast horizon and the comparison view come with Recurna Flow Pro.