What is Loan Origination System (LOS)?
Software used by lenders to manage the end-to-end loan process from application through closing and booking.
Loan Origination System (LOS) in commercial lending practice
A commercial LOS typically handles workflow management, document tracking, compliance checks, and integration with core banking systems. Major commercial LOS platforms include nCino, Abrigo, Baker Hill, MeridianLink, and Encompass. The LOS is workflow infrastructure — it does not perform the underwriting analysis itself. AI underwriting platforms like Aloan integrate with existing LOS deployments to automate the analysis layer (spreading, global cash flow, credit memo generation) without replacing the LOS itself.
Variations by loan type
How Loan Origination System (LOS) differs across CRE, C&I, and SBA
nCino
Salesforce-based commercial lending platform widely deployed at mid-size and large community banks. Strong workflow, pipeline management, and core integration. Aloan integrates as an analysis layer that runs spreading, global cash flow, and credit memo generation against documents staged in nCino, then writes results back.
Abrigo (Sageworks)
Common at community banks and credit unions. Includes an integrated loan administration and credit analysis module. AI underwriting platforms typically overlay Abrigo to handle multi-document spreading and global cash flow that Abrigo's built-in tools handle more lightly.
Baker Hill NextGen
Lifecycle commercial lending platform used by community banks. Strong workflow and policy-engine capabilities. AI-native underwriting platforms plug in at the financial analysis stage, returning structured data and a draft memo into the Baker Hill workflow.
MeridianLink, Encompass, custom
Many banks run mixed environments, including legacy in-house LOS and consumer-led platforms (Encompass) extended into commercial. AI underwriting integrates via document staging, API, or SFTP regardless of LOS, because the analysis layer is decoupled from workflow.
Further reading
Go deeper on Loan Origination System (LOS)
Frequently asked
Loan Origination System (LOS) FAQ
Do I need to replace my LOS to add AI underwriting?
No. Modern AI underwriting platforms (Aloan included) are designed as an overlay on top of an existing LOS. Documents come in through the same intake process, the AI runs spreading, global cash flow, and credit memo generation, and the structured outputs flow back into the LOS workflow. The LOS continues to own pipeline, approval routing, and core integration.
What is the difference between an LOS and a credit decisioning engine?
An LOS manages workflow, document tracking, compliance, and integration with the core. A credit decisioning engine runs the analysis and policy logic that produces a recommendation. Most commercial LOS platforms include a lightweight decisioning capability, but the heavy lifting (spreading, global cash flow, memo drafting) typically happens in specialized analysis tools or now in AI underwriting overlays.
Can AI underwriting integrate with my LOS via API?
Yes. nCino, Abrigo, Baker Hill, and most modern LOS platforms expose APIs (or accept structured data via SFTP and file drop) for both document intake and writing structured analysis results back into the loan record. AI underwriting platforms like Aloan ship LOS integrations and can also run alongside in a parallel workflow if direct integration is not yet in scope.
What does "LOS overlay" mean?
An overlay is software that sits on top of an existing LOS to handle a function the LOS does poorly or not at all — typically the financial analysis layer (spreading, global cash flow, credit memo drafting). The overlay does not replace the LOS. The bank keeps its workflow, approvals, document repository, and core integration. The overlay just makes the analysis step faster, more consistent, and source-cited.
Related terms
Related concepts in commercial underwriting
Credit Memo
A formal written analysis prepared by a loan officer or credit analyst that summarizes a borrower's creditworthiness, the proposed loan structure, risk factors, mitigants, and a recommendation to approve or decline.
Read definitionFinancial Spreading
The process of extracting financial data from tax returns, financial statements, and other documents and organizing it into a standardized format for credit analysis.
Read definitionGlobal Cash Flow Analysis
An underwriting approach that consolidates the cash flows of all related entities and guarantors — not just the borrowing entity — to assess total repayment capacity.
Read definitionSee it in Aloan
How Loan Origination System (LOS) shows up in AI underwriting
Aloan automates the underwriting analysis where loan origination system (los) matters — spreading, global cash flow, credit memo generation — with source-cited audit trails on every figure. See it run on a real deal in your standardized format.
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