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Multi-Currency Invoice Processing: A Walkthrough

This example follows a consulting firm processing supplier invoices in three currencies — EUR, GBP, and USD — across a single month. Manually, each foreign-currency invoice takes 10–15 minutes because the bookkeeper must look up the exchange rate, convert the amount, handle the VAT, and record both the invoice-currency and base-currency values. With Nika each invoice is read, converted using the correct rate, coded, and filed at {price} per processed invoice — the multi-currency complexity is handled at extraction.

Before: manual process

A UK-based consulting firm with operations across Europe processes roughly 40 foreign-currency supplier invoices a month: AWS in USD ($3,200), a Dutch design contractor in EUR (€4,500), and an Irish software vendor in EUR (€890), among others. The bookkeeper opens each invoice, looks up the HMRC exchange rate for the invoice date, manually converts the amount to GBP, splits out the VAT (where applicable), and enters both the original currency and GBP values into the accounting system. A USD AWS invoice with no VAT takes 10 minutes; a EUR invoice with reverse-charge VAT takes 15. Exchange-rate differences between invoice date and payment date create revaluation entries at month-end — a manual adjustment that takes another hour. Total monthly time: roughly 10 hours of bookkeeper time at £15/hour = £150/month.

After: with Nika

The same invoices arrive. Nika reads each invoice in its original currency — AWS $3,200 USD on 2025-03-10, Dutch contractor €4,500 EUR on 2025-03-12 — applies the correct exchange rate for the invoice date, converts to GBP, and records both values in the accounting system. For the EUR invoices, Nika identifies the reverse-charge VAT treatment based on the supplier's VAT registration country and codes it correctly. At month-end, any exchange-rate differences between invoice date and payment date are flagged for the accountant to review — the revaluation adjustment is pre-calculated, not manually reconstructed. The bookkeeper reviews the coded entries in the approval queue and confirms. Total human time: 20 minutes of review per month.

Workflow

  1. 1

    Read original currency

    In: Invoice PDF — AWS $3,200 USD, Dutch contractor €4,500 EUR, Irish vendor €890 EUR
    Out: Invoice currency and amount detected; supplier VAT country identified
    Saved: Eliminates manual currency identification and rate lookup per invoice
  2. 2

    Apply exchange rate

    In: Invoice date + HMRC/ECB rate for that date
    Out: GBP value calculated: $3,200 → £2,560 (at 0.80), €4,500 → £3,825 (at 0.85)
    Saved: ~5 minutes per invoice vs. manual rate lookup and conversion
  3. 3

    Handle VAT treatment

    In: Supplier VAT country + invoice tax breakdown
    Out: Irish vendor: reverse-charge intra-EU acquisition coded; AWS: no VAT (US supplier)
    Saved: Eliminates manual VAT treatment determination per foreign invoice
  4. 4

    Flag month-end revaluation

    In: Payment date vs. invoice date exchange rates
    Out: Exchange differences pre-calculated for accountant review — not manually reconstructed
    Saved: ~1 hour/month of manual revaluation entries eliminated

Cost comparison

MethodCostTime
Manual — bookkeeper (10 hrs/month, £15/hr)£150 / month (~£3.75 / invoice)10–15 min per foreign-currency invoice
Outsourced bookkeeper (foreign-currency surcharge)Typically 1.5–2× domestic rate per invoiceWeekly batch, 3–5 day turnaround
Nika (per processed invoice){price} / invoiceSame-day, no batch delay

Key takeaways

  • Multi-currency complexity — rate lookup, conversion, VAT treatment — is handled at extraction, not at manual entry.
  • The exchange rate is applied for the invoice date automatically, eliminating per-invoice rate lookups.
  • Reverse-charge VAT for intra-EU acquisitions is coded based on supplier VAT country, not guessed.
  • Month-end revaluation is pre-calculated, turning an hour of manual adjustments into a review.

Questions

Which exchange rate does Nika use?

Nika uses the official rate for the invoice date — HMRC's monthly or spot rate for UK businesses, the ECB rate for EUR-based businesses, or your accounting system's configured rate source. The rate is recorded with the invoice entry so it is auditable. If your business uses a specific rate source, Nika can be configured to match.

How does Nika handle exchange-rate gains and losses at payment?

When the payment date differs from the invoice date and the exchange rate has moved, there is an exchange difference. Nika flags these differences at month-end with the original and current rates pre-calculated, so the accountant can post the revaluation entry in minutes rather than reconstructing it from transaction histories. The entry itself requires accounting judgement — Nika prepares the data, the accountant approves it.

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