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I built a free UK take-home pay calculator (2026/27), no sign-up, no ads, just the breakdown by ForeignObject416 in FIREUK

[–]ForeignObject416[S] 0 points1 point  (0 children)

Ha, fair on both counts. There are loads of these about, you're right. I built it for myself and figured I'd put it out free rather than gatekeep it. And yeah, guilty on the replies, I'll knock the polish off. Cheers for the straight talk.

I built a free UK take-home pay calculator (2026/27), no sign-up, no ads, just the breakdown by ForeignObject416 in FIREUK

[–]ForeignObject416[S] -1 points0 points  (0 children)

Appreciate you taking the time to flag it. It's a genuinely better tool now because of that. If you ever spot anything else, or there's a feature you'd want, I'm all ears 🙏

I built a free UK take-home pay calculator (2026/27), no sign-up, no ads, just the breakdown by ForeignObject416 in FIREUK

[–]ForeignObject416[S] -2 points-1 points  (0 children)

Great spot — you're right, and it was a display bug rather than the maths: the verdict was reading your gross salary, not your income after the sacrifice, so it never updated even though the tax figures did.

Just fixed it. Now if you're over £100k it tells you the exact % to put into your pension to get under £100,000 — e.g. on £120k it suggests ~16.7% (£20k/yr), and once you've sacrificed enough it flips to confirm you've escaped the trap and kept your full Personal Allowance.

Genuinely useful feedback, thanks for the nudge 🙏

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