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Safe to Spend and Surplus Setup · Visual guide

How to track your month with Safe to spend

Updated 7 October 2026 · 4 min read

Read the line, the rows behind it and the month-end forecast to see what's left to spend.

Screenshots use fictional accounts and example amounts. Select any image to open it full size.

What Safe to spend tells you

Safe to spend is how much more you can spend on Discretionary this month and still hit your surplus target. Discretionary is everything that isn’t a bill or an essential: eating out, shopping, trips and treats. Bills and essentials are already set aside in your plan, so the number mainly watches the spending you choose.

It comes straight from the plan you saved in surplus setup. Your Discretionary plan sets the line and your monthly surplus is the target. As payments land, Surplus checks each part of the plan against what it expected by today and moves the number to match.

You’ll see the figure at the top of Home, for example £165 safe to spend. A red over plan figure means you’ve already spent past the line this month. Before you finish setup, the figure is marked draft plan and the Safe to spend tab reads “Safe to spend isn’t ready yet”.

Home showing £165 safe to spend with the month's pace bar
Home showing £165 safe to spend. Select the image to view it full size.

Open the Safe to spend tab

  1. Open Growth. The Tracking this month card shows how far your month-end forecast is from your target, −£76 in the example. See Check the month-end forecast below.
  2. Choose Breakdown. The screen opens on the Safe to spend tab, titled with the month, for example October.
  3. Review sits beside it and lists payments that still need a decision.

If you share money with a partner, a filter at the top right switches between Mine and Household. On your own, you’ll only see your figures.

Growth showing your regular month of £1,881 and tracking this month at −£76 vs expected, with the Breakdown button
Growth with Your tracking this month and the Breakdown button. Select the image to view it full size.

Read your safe to spend

The card at the top answers one question: how much more can I spend this month?

  • The headline reads £165 left in green while you’re under the line. At the line it reads £0 left. Past it, it turns red and reads, for example, £80 over.
  • The subline turns the figure into a daily amount: £7 a day for the 24 days left.
  • The bar fills as you spend. The mark labelled The line · £312 is your Discretionary plan for the month. Target · £1,881 under the end of the bar is your surplus target.
  • The sentence says what the number means in plain words: “Spend up to £165 more on Discretionary (not bills or essentials) and you still hit your £1,881 target.”

Spending past the line doesn’t break anything. It comes out of your surplus instead. The card then tells you how much of the target you’d still keep if you stopped spending today.

Tap the (i) for The bar and the line. In the example, the bar is the £2,193 left after Fixed Costs and Essentials: the £312 Discretionary plan up to the line, then the £1,881 surplus target past it.

Your safe to spend: £165 left, £7 a day for the 24 days left, the line at £312 and a £1,881 target
The Safe to spend line card. Select the image to view it full size.
The bar and the line explainer: £2,193 left after Fixed Costs and Essentials, the £312 Discretionary plan then the £1,881 surplus target
The bar and the line explainer. Select the image to view it full size.

See how it adds up

How it adds up shows the sum behind the headline, one row per part of your plan:

  • Discretionary plan: where the line sits, £312 in the example.
  • Discretionary spent: everything that isn’t a bill or an essential, −£192 so far.
  • Fixed Costs: bills paid against what your plan expected by today. “£1,681 paid of £1,697 expected by today” gives +£17.
  • Essentials: groceries, transport and other must-haves, again against what was expected by today. “£237 spent of £265 expected by today” gives +£28.
  • Income: what has landed against what was expected by today. In early October no salary is due yet, so it reads £0.

A plus row is running under its plan and gives you a little more room. A minus row is running ahead and takes room away. The rows add up to the total: Left to spend £165 in the example, or Over the line once you’ve passed it.

A bill paid a few days earlier than usual, or a salary that hasn’t arrived yet, can show as a minus row for a while. That’s timing, not overspending. It evens out when the month catches up.

How it adds up: Discretionary plan £312, Discretionary spent −£192, Fixed Costs +£17, Essentials +£28, Income £0, Left to spend £165, then a month-end forecast of £1,805 against a £1,881 target
How it adds up and the month-end forecast. Select the image to view it full size.

Check the month-end forecast

The dark card under the rows shows where the month is heading. It assumes you keep to your plan for the rest of the month, including the Discretionary spend still planned for the days left.

In the example the forecast is £1,805 against a £1,881 target: “£76 below your target if you keep to your plan for the 24 days left.” Spending less than planned for the rest of the month closes the gap. A month ahead of plan reads “above your target” instead.

Switch between Mine and Household

Mine shows your share of everything, so it matches the number on Home. Household shows the whole household plan, including money that lands in your partner’s share.

In the example household, the Household view reads £442 left against a £624 line and a £1,717 household target. It also adds a row for each Shared Pool entry. Sam’s credit card reads “Estimate until the payment lands” until a matching payment arrives. The household forecast is £1,676, £41 below the household target.

Household safe to spend: £442 left, £18 a day for the 24 days left, the line at £624 and a £1,717 target
Household safe to spend. Select the image to view it full size.
Household rows including Sam's credit card as an estimate with a household forecast of £1,676
Household rows and forecast. Select the image to view it full size.

What moves the number

  • New payments. Discretionary spending lowers it, while bills and essentials only move it when they run ahead of or behind the plan.
  • Your edits. Changing how a payment counts changes the month straight away. In the example, the £189 council tax was paid from savings set aside in a virtual bucket. It left October’s spending, the bill still counted as paid and Safe to spend rose from £165 to £260, by the £94.50 that was your share. See Edit a transaction and Use virtual buckets.
  • Your plan. Edit surplus in Growth reopens the planner. Raising your Discretionary plan moves the line up and lowers the target by the same amount. Changing income, bills or essentials moves the target.

Use the Review tab to answer payments that Surplus needs your help with. Until you do, a payment out counts as ordinary spending. When nothing is waiting, it reads “Nothing to review right now.”

Your safe to spend after the edit: £260 left, £11 a day for the 24 days left
Safe to spend after the council tax edit. Select the image to view it full size.
The Review tab with nothing to review right now
The Review tab. Select the image to view it full size.

Continue reading

How to set up your surplus