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@frankel@mastodon.top
2026-06-14 17:06:55

'Never use double for money' is dogma, not engineering.
Guest author Stefano Fago breaks down when double, BigDecimal, or fixed-point is the right call, and the production traps that quietly undo each one.
blog.frankel.ch/bigdecimal-vs-

double, BigDecimal, or Fixed-Point?
There is an evergreen debate in the Java world: should you always use BigDecimal for money? The short answer is no. The real answer is: it depends on your computational context: the precision you need, the rounding rules you must follow, and the performance budget you have. The problem is that this conversation is often driven by dogma rather than engineering.