--- title: "Accounting AI: invoicing, reconciliation, close-ready books" description: "Production AI for SME finance. Invoicing that chases itself, continuous reconciliation, and a close-ready ledger. The finance function a growing business needs before it can staff one." source: "https://www.kensink.com/industries/accounting-ai/" canonical: "https://www.kensink.com/industries/accounting-ai/" --- ★ Industry vertical · Accounting AI 06 service items SME-grade engagements INDUSTRY · ACCOUNTING AI · INVOICING + BOOKS # AI for the finance back office. Books that keep themselves. Production AI for SME finance: invoicing that raises and chases itself, categorization and reconciliation that run as money moves, and a ledger that stays close-ready year round. The finance function a growing business needs before it can staff one. [Start a project →](https://www.kensink.com/contact) [View case studies →](https://www.kensink.com/cases) Industry SME finance · accounting Fit Teams without a finance dept Output A business AI you own Stack Direct LLM · ledger-grade \[WHAT WE HEAR FROM FOUNDERS AND OPERATORS\] ## Three pains every growing SME hits. We have shipped payments and ledger systems since 2019, from field-service platforms to multi-processor reconciliation. The finance pains of a growing SME repeat. The fix is not another spreadsheet template. It is a business AI that does the repetitive finance work continuously, so the numbers are current and the close is a review. PAIN · 01 01 / 03 ### The founder is the finance team. Invoices, chasing, categorization, and the month-end close all land on the person who should be running the business. It is the most expensive data entry in the company. ↓ How we fix it, below. PAIN · 02 02 / 03 ### The numbers are never current. Because the books are rebuilt monthly instead of kept live, nobody trusts them mid-month. Decisions get made on a bank balance and a gut feel. ↓ How we fix it, below. PAIN · 03 03 / 03 ### Cash sits in unsent, unchased invoices. Money already earned waits on someone remembering to invoice and follow up. The slowest part of cash flow is a human to-do list. ↓ How we fix it, below. \[SIX SERVICE ITEMS · ONE TEAM\] ## Pick the finance problem. We'll bring the business AI. Engagements sized for a small team, built on ledger engineering that has run in production since 2019. Bundle two when the problem warrants. SERVICE · 01 / 06 Raise, send, chase Invoice automation Invoices raised from your orders, sent on time, and chased on a schedule until they are paid. - Auto-drafted from orders and projects - Scheduled follow-ups at 15 / 30 / 45 days - Payment status synced back to the ledger TypeScript Postgres Payment APIs SERVICE · 02 / 06 Books that stay clean Continuous reconciliation Transactions categorized and accounts reconciled as money moves, not rebuilt at month-end. - Rules plus LLM categorization with review - Bank-feed matching as transactions land - Discrepancies flagged, not buried Python Postgres Bank feeds SERVICE · 03 / 06 Month-end as a review Close-ready ledger A ledger kept close-ready all year, so the monthly and quarterly close is an hour of review. - Always-current trial balance - Pre-close checklist automated - Clean export for your accountant TypeScript Postgres Zod SERVICE · 04 / 06 Your chart, your terms Business AI shaped to you A finance AI built around your chart of accounts, terms, and workflows, not a fixed template. - Your account structure, not ours - Custom terms and approval rules - Owned by you, not locked in Direct LLM TypeScript Zod SERVICE · 05 / 06 Numbers you can trust Finance eval and guardrails An eval suite on categorization and reconciliation accuracy, so the automation earns trust before it runs unattended. - Labeled golden set of transactions - Accuracy gates before auto-posting - Human-in-the-loop on low confidence Promptfoo TypeScript Postgres SERVICE · 06 / 06 Pre-build wedge Architecture review A one-week review of your finance stack and where AI safely fits: data sources, controls, and the automation boundary, named in writing. - Data sources and integrations scored - Automation-vs-human boundary drawn - Controls and audit posture reviewed ADRs Postgres TypeScript Most engagements bundle two: the build that removes the busywork (01, 02) paired with the discipline that makes the numbers trustworthy (03, 05). Bring the shape closest to your blocker. [Scope your engagement →](https://www.kensink.com/contact) Want to see the K-Framework discipline behind every item? [Read the K-Framework](https://www.kensink.com/k-framework). \[THE STACK · BY LAYER\] ## Ledger-grade infrastructure. SME-grade simplicity. The payments and ledger engineering behind NuForce, sized for a small team. Boring, tested, and yours at handoff. LAYER · DATA + RETRIEVAL ### Data + retrieval. The store, the index, the search PostgreSQL pgvector Redis ClickHouse BigQuery OpenSearch LAYER · MODEL LAYER ### Model layer. Embeddings, providers, fallbacks OpenAI Anthropic Cohere Embed Voyage Llama (self-hosted) vLLM LAYER · EVAL + OBSERVABILITY ### Eval + observability. The eval bar, the cost meter, the drift alarm LangSmith Promptfoo OpenTelemetry Datadog Grafana Sentry LAYER · BACKEND + TRANSPORT ### Backend + transport. Type-safe everything TypeScript Next.js Python FastAPI gRPC BullMQ tRPC Zod LAYER · MOBILE ### Mobile. iOS + Android, native or cross React Native Expo Swift Kotlin FCM APNs LAYER · CLOUD + DEPLOYMENT ### Cloud + deployment. Whatever your infra already runs Cloudflare Workers Cloudflare R2 AWS GCP Vercel Fly ✕ WHAT WE DO NOT SHIP ### Direct against the model API. Every posting reviewable. - ✕ No LangChain - ✕ No LlamaIndex - ✕ No agent framework - ✕ No orchestration vendor - ✕ No black-box ML platform \[ PROOF · WHAT THE STACK DELIVERS \] ## Numbers that tie out. MEASURED · WEIGHTED · 2019–2026 SCALE 200 + B2B accounts on the NuForce ledger ACCURACY < 1 % Settlement variance auto-reconciled SPEED Days → hr Month-end close, once it runs HANDOFF Owned The business AI stays with you ACCOUNTING AI · APPLIED K-FRAMEWORK ## Bring the finance busywork. We'll bring the business AI. Give a growing SME the finance function it needs before it can staff one. Invoicing, reconciliation, and a close-ready ledger, built on ledger engineering that has run in production since 2019. [Start a project →](https://www.kensink.com/contact) [Read the K-Framework](https://www.kensink.com/k-framework) FIT SME · no finance team OUTPUT Invoicing · books · close OWNERSHIP Your business AI, yours