Developers

Put accurate compliance calculations inside your website, payroll or accounting software.

1. Embed a calculator (free)

Paste this on any page. The calculator stays up to date automatically, with a small “by NiyamHQ” credit.

<iframe src="https://niyamhq.in/embed/wage-pf-calculator"
        width="100%" height="900" loading="lazy"
        style="border:0;border-radius:12px"
        title="Labour Code Wage & PF Calculator"></iframe>

Replace wage-pf-calculator with any tool id below.

2. REST API (Business plan)

Create a key in Dashboard → API keys. 10,000 calls a month on Business; more on Enterprise.

curl -X POST https://niyamhq.in/api/v1/penalty-calculator \
  -H "Authorization: Bearer nhq_live_…" \
  -H "Content-Type: application/json" \
  -d '{"returnType":"GSTR-3B","dueDate":"2026-08-20","filingDate":"2026-09-19","taxPayable":50000,"aato":10000000}'

{
  "tool": "penalty-calculator",
  "result": { "delayDays": 30, "lateFee": 1500, "interest": 739.73, "total": 2239.73, ... },
  "disclaimer": "For estimation only; not legal or tax advice."
}

• GET /api/v1/tools — list all tools.
• GET /api/v1/<tool> — the tool's input JSON Schema.
• POST /api/v1/<tool> — run a calculation. Errors return 400 with field-level issues; 429 when the monthly quota is used.
• Responses include X-RateLimit-Limit and X-RateLimit-Remaining.

Tool ids

• penalty-calculatorGST Interest & Late Fee Calculator
• wage-pf-calculatorPF Calculator – New Labour Code 50% Wage Rule
• gratuity-calculatorGratuity Calculator – Old vs New Labour Code
• esi-calculatorESI Calculator – Employee & Employer Contribution
• pt-calculatorProfessional Tax Calculator – State-wise PT Slabs
• liability-calculatorGST Payable Calculator – ITC Set-off (Rule 88A)
• itc-reversal-rule42ITC Reversal Calculator – Rule 42 & Rule 37
• itc-reversal-rule37ITC Reversal Calculator – Rule 42 & Rule 37
• gstr1-vs-gstr3bGSTR-1 vs GSTR-3B Reconciliation – Mismatch Checker
• registration-checkerGST Registration Limit Checker – Threshold by State
• composition-scheme-calculatorComposition Scheme Calculator – GST Eligibility
• e-invoice-checkerE-Invoice Applicability Checker – Turnover Limit
• e-way-bill-checkerE-Way Bill Limit & Validity Checker
• export-refund-calculatorGST on Exports Calculator – LUT vs IGST Refund
• bonus-calculatorBonus Calculator – Statutory Bonus 8.33% to 20%
• maternity-benefit-calculatorMaternity Benefit Calculator – 26 Weeks Leave
• overtime-calculatorOvertime Calculator – Working Hours Under OSH Code
• retrenchment-compensation-calculatorRetrenchment Compensation Calculator – IR Code
• ctc-in-hand-salary-calculatorSalary Calculator – CTC to In-Hand (Labour Code)
• full-and-final-settlement-calculatorFull and Final Settlement Calculator – 2-Day Rule
• gstr-2b-reconciliationGSTR-2B Reconciliation Tool – Match Purchases
• itc-eligibility-checkerITC Eligibility Checker – Blocked Credit u/s 17(5)
• reverse-charge-checkerRCM Under GST – Reverse Charge List & Checker
• hsn-sac-lookupHSN Code Finder & SAC Code Lookup
• gstin-validatorGST Number Checker – GSTIN Format & State Validator
• compliance-checklistNew Labour Code Compliance Checklist Generator
• standing-orders-checkerStanding Orders Applicability Checker – IR Code
• portal-error-lookupGST Portal Error Codes & How to Fix Them
• notice-typesGST Notice Types Explained – ASMT-10, DRC-01 & More
• forex-ratesLatest stored RBI/FBIL reference rates
• reply-template-generatorGST Notice Reply Format – Template Generator

Integrating with Tally, Zoho Books or your ERP? Talk to us about white-label and volume pricing.