Did some calculations…
Sophie Baek spent most of her life thinking she’d been rejected by her late father—despite his promise to take care of her. But the truth of the matter—which Sophie finds out in Part 2 of Bridgerton Season 4—is that her father left her and her stepsisters an equal share in his will. Specifically, an 18,000 pound dowry.
As we know, Sophie’s stepmother, Lady Araminta, stole this money and added it to her daughter’s dowry to make her more eligible on the marriage market. And if you’re wondering how much 18,000 pounds would be in 2026, it’s a LOT of money.
According to Bank of England’s calculator, £18,000 in Regency England amounts to £1,345,608.20 in today’s market.

We also know that Lady Araminta was being paid 4,000 pounds per year to “keep” Sophie following her father’s death (which is why she manipulated her into being a maid), and that amounts to about £299,024.04 per year.
In other words, a lot of money is at stake in the world of Bridgerton Season 4!
Source: https://www.cosmopolitan.com/