He adjusted the numbers. What if he bought it through a ? The calculator reminded him that while the SDLT remained high, the long-term tax relief might balance the scales. He tried a lower purchase price—£225,000. The tax dropped significantly.

The calculator’s digits spun like a slot machine. The base tax was one thing, but that 3% levy added a staggering £7,350 to the bill. The total jumped from a manageable few thousand to nearly £10,000 before he’d even bought a tin of paint.

By midnight, the calculator had told Arthur a hard truth: the Manchester house was a vanity project at its current price. The numbers—those cold, unfeeling pixels—had saved him from a five-figure mistake.

He closed the laptop. The calculator didn't just provide a sum; it provided . In the high-stakes game of buy-to-let, the first profit isn't made when you sell—it's made when you calculate the entry fee correctly.