Mersal Multi-Currency & Frozen FX
The problem
A firm billing in more than one currency has two bad options in most systems: convert everything at today's rate, so last year's revenue changes every morning, or store nothing and reconcile by hand. Both make the accounts an argument.
How Mersal solves it
Every issued document carries its own currency and its own conversion rate, frozen at the moment of issue. Reporting derives from the document, never from today's market. Changing the firm's base currency is a deliberate, guided operation that re-bases historical documents for reporting without ever altering what a client was charged.
How it works
The document is the source of truth
A $1,000 invoice was billed in dollars and keeps saying so. Its stored rate maps it into the firm's reporting currency; the amount the client owes never changes because a rate moved.
Changing base currency without rewriting history
When a firm changes its reporting currency, Mersal asks the question that actually matters: were the old figures really in the old currency, or was the setting simply wrong? Convert re-bases them at a stated rate; relabel counts them one-to-one. Either way invoice amounts are untouched.
Tax in the currency the authority wants
The VAT line can be carried in a local currency alongside the billing currency, because the client and the tax authority do not always want the same denomination.
What it prevents
- Last year's revenue changing because a rate moved
- A base-currency change silently rewriting client invoices
- Hand-reconciling foreign work in a spreadsheet
The fastest way to judge this is to watch it run against your own way of working.