Safe to Spend, explained.
The one number that tells you what’s genuinely yours to spend - after everything that’s already spoken for.
Safe to Spend is the money you can spend today without putting your bills, commitments or savings goal at risk. Surplus works it out from your real accounts - subtracting upcoming bills, subscriptions and the amount earmarked for your goal - so the number you see is genuinely yours to spend.
Why most “left to spend” numbers lie
Most apps show your balance minus what you’ve spent. But that number still includes rent, bills, subscriptions and the cash you meant to save - money that isn’t really free. So it tells you that you have plenty, right up until you don’t.
How Surplus calculates it
Surplus connects to your accounts through read-only Open Banking, then subtracts what’s already committed - upcoming bills, recurring subscriptions and your goal contribution - from what’s actually coming in. What’s left is your Safe to Spend, recalculated as life happens.
Set a plan. Get one honest number.
Surplus turns your budget into a single Safe to Spend figure - what’s genuinely yours after bills, essentials and the cash earmarked for your goal. Ask how it got there and it shows its working, line by line.
Work out what you can really afford.
A £5k holiday? Rent or buy? Just ask. Surplus AI weighs the big calls against your real cash, budget and savings goal - then tells you straight whether it fits and what it costs the rest of your plan.
Not another budget app. Not another AI chatbot. A money copilot with a real engine underneath - built by a chartered accountant and it never makes the numbers up.
Read-only Open Banking via Yapily. Bank-grade encryption. We can’t move your money.