Before you build payments in-house, read this.

The choice to build in house or partner with a provider depends on your business goals, timeline, and resources. This post outlines the key criteria: strategic focus, speed, economics, compliance risk, user experience, and technical capability, and includes practical trade offs for each criterion. We also recommend a partner first approach to get started, and a longer term plan to build in house for high volume platforms, plus three action steps for leaders.

Decision criteria

Strategic intent: Are payments core to your differentiation or just a utility? If embedded payments will be a major revenue channel, for example a share of fees or value added services, owning the stack can align with long term strategy. But if payments are secondary, focus on your product and leverage a partner’s expertise. Many ISVs underestimate how much margin lives inside their payments flow. Make sure you plan a clear revenue model, such as fee sharing or pricing, from the start.

Time to market: Partnering enables a faster launch. Working with an experienced payments provider can eliminate learning curves and allow you to integrate via APIs quickly. Building in house, including banking partnerships, underwriting flows, and PCI DSS compliance, can take months or years and delay return on investment. If rapid growth or customer acquisition is a priority, lean on a partner to go live immediately and start capturing data.

Cost and economics: Building your own solution means significant upfront investment in staff, licenses, bank and acquirer relationships, and compliance systems, although you keep 100 percent of fee revenue. Partnering shifts costs to a revenue share or per transaction fee model. This lowers initial spend but shares the upside. Your economics will depend on volume and margins. Remember, a platform can earn a share of transaction fees by embedding payments, but partnering may reduce those margins through pricing.

Compliance and risk: Building in house means shouldering all risk, including merchant underwriting, KYC and AML, fraud monitoring, dispute liability, and PCI DSS compliance. This is a heavy ongoing burden. A partner, or PayFac as a Service provider, handles most of that compliance and liability, significantly lowering your risk and PCI scope. Choose based on your risk tolerance. If you lack deep payments compliance expertise, outsourcing is generally safer.

Merchant experience: It is a trade off between control and convenience. Building lets you fully customize the user experience, including on brand checkout, tailored workflows, and custom reporting. Partners, however, often provide proven onboarding and reconciliation flows, fraud tools, and support infrastructure. The best strategy may be hybrid. Use a partner’s onboarding to handle underwriting, chargebacks, and approvals, while presenting a branded, embedded checkout to merchants. Aim to make payments feel native to your platform, whether built internally or powered by a partner.

Technical capability: Does your team have the bandwidth to integrate and support payments? Proper embedded payments require robust APIs, webhooks, and tokenization. If your development resources are limited or need to stay focused on core features, a partner’s SDKs and support can save significant time. On the other hand, a highly skilled fintech team may eventually absorb integration tasks. Be honest about your readiness. If you cannot handle asynchronous events, declines, reconciliation, and ongoing optimization, start with a partner.

Next steps for leaders

Audit your payments strategy: map how payments fit your business model today, including revenues, margins, and churn. Identify pain points such as decline rates, chargebacks, or KYC bottlenecks, and set clear goals such as higher approval rates or new payment types.

Engage a payments partner: rapidly prototype embedded checkout through a vendor or PayFac as a Service provider. Leverage their SDKs to learn key metrics such as authorization rates, operating costs, and conversion lift without significant effort.

Plan a phased roadmap: use data from the partner integration to decide if and when to invest in your own stack. In the short term, focus on sales and retention. In the long term, if volumes and margins justify it, consider selectively building components such as a custom user interface or risk models in house.

Choosing the right approach is not one size fits all.

Build vs partner: quick comparison

Build
Control: full ownership of roadmap, user experience, and data
Speed: slow, due to integration and compliance requirements
Cost: high, driven by development, capital expenditure, and compliance
Risk: high, including fraud and chargeback liability

Partner
Control: shared, dependent on provider capabilities
Speed: fast, with ready to use APIs and quicker launch
Cost: lower upfront, based on usage or revenue sharing
Risk: lower, with outsourced compliance and PCI scope

Considering embedded payments this year?

Let’s compare your build versus partner options and map the fastest path to revenue and scale.

https://cartispayments.com/contact/