Glossary & data model

Terms

Analytics bar — the row of summary tiles above the invoices table, shown by clicking Show Analytics. Each tile is a money total plus a small percentage. Rendered by InvoiceInfo (web) / InvoicesInfo (mobile).

Discount tile — the tile this change fixes. Money amount = sum of discounts; percentage = discount as a share of the pre‑discount price.

Subtotal — the list price of all procedures on an invoice, before any discount or tax.

Discount — the money amount taken off the subtotal.

Tax — VAT added to the invoice. Often zero for VAT‑Exempt invoices, which are common in the sandbox data.

Total — the net amount after discount and tax: subtotal − discount + tax. Because the discount is already subtracted, Total is not a valid base for a discount percentage on its own.

Pre‑discount base — total + discount. Adding the discount back to the net total reconstructs the tax‑inclusive price before the discount. This is the new denominator for the discount tile.

discountPercent (stored) — a per‑invoice field storing discount ÷ subtotal (pre‑tax). Distinct from the analytics tile's figure; the two match only when tax = 0.

Balance invoice — an invoice flagged balanceInvoice. The analytics total excludes these (filter(p => !p.balanceInvoice)), while discount sums across all invoices.

invoicesInfo — the GraphQL query that aggregates invoice money fields for the analytics bar.

The formula, before and after

Before:  discountPct = discount / total            × 100   (inflated)
After:   discountPct = discount / (total + discount) × 100  (correct)

because  total = subtotal − discount + tax
so       total + discount = subtotal + tax

Data‑model notes

Invoice (Prisma) — packages/prisma/schema.prisma:2620

InvoiceGroupInfo (GraphQL) — packages/server/src/types.graphql:4059

Returned by invoicesInfo: balanceInvoice, paid, tax, discount, diagnosticFee, pendingPayment, total, balance, released, insurance.

Source references

Worked reference numbers (sandbox)

For invoice #26 the pieces are Subtotal ₺500 − Discount ₺75 + Tax ₺63.76 = Total ₺488.76.