We architect and deploy custom Solidity/Rust smart contracts with formal verification and comprehensive audit readiness. Our code follows OpenZeppelin standards and includes gas optimization patterns to reduce transaction costs by up to 40%.
LABS
Services
EVM Recurring Billing Smart Contract Development
We build secure, gas-efficient smart contracts for automated subscription billing on Ethereum, Polygon, Arbitrum, and Base. Deploy a production-ready recurring payment system in weeks.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3 experts to power your protocol.
- End-to-End Development: From specification and
Hardhat/Foundrytesting to mainnet deployment and verification. - Security-First: Multi-signature deployment workflows, automated vulnerability scanning, and battle-tested design patterns.
- Protocol Integration: Seamless compatibility with
ERC-20,ERC-721,ERC-1155, and custom standards for DeFi, NFTs, and DAOs.
Deliver a secure, auditable, and gas-efficient smart contract system in as little as 3 weeks, eliminating the need for an in-house Solidity team.
key-features-cards
PRODUCTION-READY SOLUTIONS
Core Contract Capabilities We Deliver
Our EVM recurring billing contracts are built for scale, security, and seamless integration. We deliver battle-tested smart contracts that handle complex subscription logic with enterprise-grade reliability.
benefits
DELIVERABLES & GUARANTEES
Business Outcomes for Your Product
Our EVM recurring billing smart contracts deliver measurable business value, from predictable revenue to reduced operational overhead. Here’s what you can expect.
01
Predictable, Automated Revenue Streams
Eliminate manual invoicing and failed payments. Our contracts automate subscription billing, membership renewals, and SaaS payments directly on-chain, ensuring consistent cash flow with zero administrative delay.
100%
Automation
0 manual steps
Per Transaction
02
Enterprise-Grade Security & Audits
Every contract undergoes rigorous security audits following OpenZeppelin standards. We provide formal verification reports and implement multi-sig timelocks for treasury management to protect your funds and your users.
Zero Critical
Audit Findings
Formal Verification
Guarantee
03
Multi-Chain & Multi-Currency Support
Deploy once, run anywhere. Our architecture supports Ethereum, Polygon, Arbitrum, Base, and other major EVM chains. Accept payments in native ETH, stablecoins (USDC, DAI), or your project's custom ERC-20 token.
10+
EVM Chains
Any ERC-20
Token Compatible
04
Gas-Optimized for User Retention
High gas fees kill subscription models. We engineer contracts with batched operations, gasless meta-transactions (via ERC-2771), and state optimization to keep user onboarding and renewal costs under $0.10.
< $0.10
Avg. User Cost
Gasless UX
Option
05
Full Compliance & Flexible Logic
Build complex business rules with confidence. Implement free trials, prorated upgrades/downgrades, tiered pricing, and automated grace periods. All logic is transparent, immutable, and enforceable on-chain.
Proration
Supported
Custom Rules
Enforced On-Chain
06
Production-Ready in Weeks, Not Months
We deliver audited, fully integrated smart contracts with a frontend SDK and admin dashboard in 2-3 weeks. Our battle-tested templates and deployment pipelines eliminate development risk and accelerate your time-to-market.
2-3 weeks
To Production
Full SDK
Included
Choose the right package for your project stage
Development Tiers & Deliverables
A clear comparison of our EVM recurring billing smart contract development packages, from MVP to enterprise-grade solutions.
| Feature / Deliverable | Starter | Professional | Enterprise |
|---|---|---|---|
Custom Recurring Billing Logic | |||
Gas-Optimized Solidity Contracts | |||
Comprehensive Smart Contract Audit | Basic Review | Full Audit + Report | Full Audit + Formal Verification |
Multi-Chain Deployment Support | 1 Network | Up to 3 Networks | Unlimited Networks |
Integration Support (Frontend/Backend) | Documentation Only | Up to 10 Hours | Dedicated Engineer |
Production Monitoring & Alerting | 30 Days | 6 Months | 12 Months + SLA |
Priority Support & Response Time | 48h (Email) | 24h (Slack/Email) | 4h (Dedicated Channel) |
Post-Launch Maintenance & Upgrades | Optional Retainer | Included (Quarterly) | |
Custom Feature Development | Add-on Scope | Roadmap Planning Included | |
Estimated Delivery Timeline | 2-3 Weeks | 4-6 Weeks | 8-12 Weeks |
Starting Price | $15,000 | $45,000 | Custom Quote |
how-we-deliver
PROVEN METHODOLOGY
Our Development & Security Process
From initial design to mainnet deployment, our battle-tested process ensures your recurring billing contracts are secure, efficient, and ready for scale.
01
Architecture & Specification
We define the exact business logic, token standards (ERC-20, ERC-777), and integration points for your subscription model, ensuring a solid technical foundation.
1-3 days
Design Phase
100%
Requirement Clarity
02
Secure Smart Contract Development
Implementation in Solidity 0.8+ using OpenZeppelin libraries. We focus on gas optimization, upgradeability patterns (Transparent Proxy), and comprehensive unit testing.
>95%
Test Coverage
OpenZeppelin
Security Base
03
Rigorous Security Audits
Multi-layered review process including internal audits, automated analysis (Slither), and optional third-party audits from firms like CertiK or Quantstamp.
2+ Rounds
Audit Cycles
Critical
Zero Findings
04
Testnet Deployment & Simulation
Deploy to Sepolia or Goerli for end-to-end testing. We simulate edge cases, failed payments, and high-load scenarios to ensure real-world reliability.
All EVM Chains
Compatible
1000+
Tx Simulations
05
Mainnet Launch & Monitoring
We manage the secure deployment to your chosen mainnet (Ethereum, Polygon, Arbitrum) and provide 24/7 monitoring for transaction success and contract health.
< 1 hour
Deployment Window
24/7
Initial Monitoring
EVM Recurring Billing Development
Frequently Asked Questions
Answers to common technical and commercial questions about our custom EVM recurring billing smart contract development service.
We deliver a production-ready, audited solution in 3-6 weeks on average. The timeline depends on complexity: a standard subscription model with basic payment logic takes ~3 weeks, while a multi-chain, gas-optimized protocol with complex proration and upgrade paths can take 4-6 weeks. We provide a detailed project plan with milestones during the initial scoping call.
ENQUIRY
Get In Touch
today.
Our experts will offer a free quote and a 30min call to discuss your project.
NDA Protected
Confidentiality24h Response
Time to ValueDirectly to Engineering Team
No Sales Fluff10+
Protocols Shipped
$20M+
TVL Overall