B2B Invoicing Data Model

A easy Data Modeling interview practice problem on DataDriven. Write and execute real data modeling code with instant grading.

Domain

Data Modeling

Difficulty

easy

Seniority

L4

Problem

We're a B2B SaaS company that bills customers monthly. Each invoice has a header with customer info and billing period, plus variable line items for subscription tiers, usage overages, and one-time charges. Finance needs to reconcile payments against invoices and track outstanding AR by customer. Design the data model.

Summary

Invoices go out, partial payments trickle in, and some customers are three months overdue.

Practice This Problem

Solve this Data Modeling problem with real code execution. DataDriven runs your solution and grades it automatically.