Tax1099
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NumeralWhat is Abound?
Founded in 2015 and headquartered in San Francisco, Abound provides APIs for W-9 collection, TIN verification, 1099 filing, and self-employment tax workflows. Its public product is built for platforms rather than standalone tax consumers.
Abound embeds tax compliance into another company’s product through REST APIs, dashboard tools, and white-label components. Platforms can collect W-9 data, verify SSNs, EINs, and TINs, generate forms, submit federal and state filings, and issue documents electronically or by mail. Developer documentation describes separate sandbox and billed production environments, bearer authentication, API resources, and webhooks for workflow events. The platform also supports corrections, document retention, and electronic or physical delivery of taxpayer forms.
The product covers W-9 and W-8 collection, real-time TIN matching, 1099-K, 1099-INT, and 1099-NEC support, corrections, voids, B-Notice automation, document retention, and batch filing. Its tax APIs also calculate self-employment obligations, support quarterly federal and state payments, and classify transactions. Abound is designed for embedded workflows, so organizations seeking a traditional desktop tax package or broad corporate tax provision suite will need another category of tool.
Abound is aimed at marketplaces, payroll and payments platforms, financial services companies, and other businesses that pay or support independent workers. The company promotes setup in less than 24 hours, but implementation still requires engineering work and tax-process ownership. Public pricing is custom and volume-based rather than a posted per-form schedule, with buyers directed toward a sales conversation and developer access.
Key features
W-9 collection
Collect and update taxpayer information through an embeddable, white-label W-9 component.
TIN verification
Run real-time SSN, EIN, and TIN matching through the dashboard or API.
1099 filing
Generate and submit 1099-K, 1099-INT, and 1099-NEC forms to federal and state authorities.
Corrections and voids
Support corrected and voided forms while retaining tax documents through the API.
Tax calculations
Calculate self-employment, federal, and state tax obligations using income, deductions, W-2 data, payments, and mileage.
Estimated payments
Submit quarterly federal and state estimated tax payments and return status updates and Form 1040-ES receipts.
Transaction predictions
Identify 1099 income and classify potentially deductible business transactions from unsorted data.
Abound pricing
Abound does not publish numeric tiers or a standard per-form price on its public materials. Production use is billed, while the documentation provides a separate sandbox environment for development and testing. Buyers should request a volume-based quote covering verification, filing, payments, and document services.
| Plan | Price | What's included |
|---|---|---|
| Custom | CustomFinal scope and charges are established in the sales quote. | W-9 collection, TIN verification, 1099 generation and filing, corrections, document delivery, tax calculations, estimated payments, and API access |
Free trial: Sandbox access is available for testing before production billing.
Pros & cons
Pros
- Combines W-9 collection, TIN matching, filing, corrections, and document delivery in one API workflow.
- Supports federal and state filings plus electronic and physical form issuance.
- Provides tax calculations and quarterly estimated-payment capabilities beyond basic 1099 filing.
- Offers a white-label interface and sandbox environment for embedded product teams.
Cons
- Public pricing does not provide a numeric entry price or standard self-serve tier.
- The product requires engineering resources rather than functioning as a simple standalone tax application.
- Its strongest fit is 1099 and independent-worker workflows, not broad corporate tax compliance.
- The homepage highlights 1099-K, 1099-INT, and 1099-NEC rather than an extensive catalog of payroll and corporate returns.
Who is Abound best for?
- Marketplaces paying large populations of independent workers.
- Fintech platforms embedding 1099 compliance into their products.
- Payroll and payments companies needing API-based tax workflows.
- Teams that want white-label taxpayer experiences.
Coverage
Integrations
Notable customers
Frequently asked questions
How much does Abound cost?
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Abound uses custom, volume-based pricing and does not publish a numeric starting price. Production API use is billed, while the documentation provides a separate sandbox environment for testing.
How does Abound work and how long does implementation take?
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A platform collects taxpayer data through Abound’s API or embedded components, verifies TINs, and submits forms or payments through production endpoints. Abound says its API can be integrated in less than 24 hours, although the actual timeline depends on the buyer’s product, data, and compliance workflow.
How does Abound compare with Tax1099?
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Abound is primarily an embedded API for platforms that want to keep the taxpayer experience inside their own product. Tax1099 is positioned more directly as a filing service, making it a closer fit for businesses seeking a ready-made filing workflow rather than developer-led infrastructure.
What integrations does Abound support?
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Abound’s documented integration method is its REST API, with sandbox and production environments, bearer authentication, API resources, and webhooks. The public materials do not provide a verified catalog of plug-ins for accounting, payroll, or ERP systems.
Who should use Abound?
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Abound is built for marketplaces, fintech companies, payroll providers, payment platforms, and other businesses supporting independent workers. It is less suitable for an accountant or small business that only wants a standalone interface for occasional 1099 filing.
How accurate and secure is Abound?
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Abound uses real-time TIN matching, validation, correction and void support, and automatic re-queuing during IRS system outages. Its API documentation distinguishes sandbox from billed production access and documents credential-based authentication.
Sources
Facts and pricing verified on October 19, 2026. Vendors change pricing often, so confirm with Abound before buying. How we research
