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Checking a deal is free. Pro is the £4.99 that stops a costly mistake — the deeper checks a serious buyer runs before committing real money: exactly where the deal breaks, and the loan a lender will actually give you.

• Sensitivity stress-grid — instantly see cashflow if rates rise 1–2%, rent drops 5–10%, or voids double. Know your break-points before the market finds them.
• Lender reality check — the biggest loan the ICR test will actually allow at your stress rate, and whether your deal clears it. Stop finding out at the mortgage application.
• Personal vs limited company — after-tax cashflow side by side, so you can see the £-difference Section 24 makes before you decide how to hold a property.
• Priority features — Pro subscribers get every new tool first, and vote on what's built next
• Support an independent UK tool — no ads, no selling your data, ever
• 14-day no-quibble refund. If Pro doesn't earn its keep, email and we'll refund in full.

Payments are processed securely by Stripe — we never see your card details. Subscriptions renew automatically until cancelled; cancel any time and keep access to the end of the paid period. See the terms of use and privacy policy. StackCheck is a screening tool, not financial advice.

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