🛠️ Business Tools & Calculators Implementation Roadmap — R.C. Dave Group
← Back to Sitemap Commercial Proposal →
TECHNICAL ROADMAP & FEASIBILITY SPECIFICATION

30 Business Tools & Calculators Catalog

Complete classification of implementation methods, reference links, API integrations, and client inputs required.

Total Tools: 30 Calculators & Utilities
Phase 1 Ready: 13 Formula Tools
API / Data Dependent: 10 Tools
Pending Inputs / Unfeasible: 7 Tools
Category A — 13 Tools

Formula & Logic Calculators

Built-in math & tax logic. Zero recurring API cost.

Category B — 4 Tools

Database & Schedule Tools

Requires curated database or rule lists from client.

Category C — 6 Tools

API / Paid Provider Integrations

Requires third-party API keys or MCA integration.

Category D — 7 Tools

Pending Strategy Inputs / Unfeasible

No public API or awaiting quiz/formula inputs.

1. GST Services Tools (6 Tools)

1. GST Calculator

Logic-Based (Built)

Calculates CGST, SGST, IGST breakdown across 5%, 12%, 18%, 28% slab rates with Inclusive and Exclusive modes.

References:
✅ Implementation: Built-in JavaScript math logic. Included in base package. Live demo on wireframe: tools/gst-calculator.html.

2. Reverse GST Calculator

Logic-Based (Built)

Extracts net amount and tax portion from a gross GST-inclusive invoice total.

Reference:
✅ Implementation: Built-in math formula `[Gross Amount × Rate / (100 + Rate)]`. No API needed.

3. HSN Code Finder

Database-Driven

Searchable index of Goods & Services HSN/SAC codes with tax rate slabs.

Reference:
📋 Client Input Needed: Requires complete master JSON/CSV dataset of HSN/SAC codes with description and tax slab rates.

4. GSTR Due Date Calendar

Database / Rule-Driven

Interactive calendar displaying filing due dates for GSTR-1, GSTR-3B, CMP-08, GSTR-9 across monthly and QRMP taxpayers.

Reference:
📋 Client Input Needed: Need monthly schedule update or admin CMS interface to update compliance calendar dates as notifications change.

5. GSTIN Verification Tool

API Integration

Fetches taxpayer name, business structure, registration date, and active status directly from GST portal via GSTIN number.

Reference:
🔑 API Key / Provider Needed: Official GST API GSP partner key or third-party GSTIN lookup provider (e.g. Surepass / Sandbox / Signzy API).

6. GST Late Fee Calculator

Rule Logic-Based

Calculates per-day late fee (NIL return vs Tax liability) + interest at 18% p.a. based on delay days.

Reference:
📋 Client Input Needed: Confirm exact late fee capping rules (e.g. ₹500 cap for NIL, ₹2,000 / ₹5,000 max cap per return type).

2. Income Tax Tools (4 Tools)

7. Income Tax Calc (Old vs New Regime)

Logic-Based (Built)

Side-by-side tax liability comparison between Old Regime (with 80C/80D/HRA deductions) and New Regime (Section 115BAC slab rates).

Reference:
✅ Implementation: Built-in tax slab formula for FY 2025–26 / FY 2026–27. Included in base package.

8. HRA Exemption Calculator

Logic-Based (Built)

Computes min of: (1) Actual HRA received, (2) 50%/40% of Basic salary, (3) Rent paid minus 10% of Basic.

Reference:
✅ Implementation: Built-in Section 10(13A) formula logic. Metro (50%) vs Non-metro (40%) toggle.

9. Capital Gains Tax Calculator

Logic-Based (Built)

Calculates STCG & LTCG tax on equity shares, mutual funds, property, and gold with holding period rules.

Reference:
✅ Implementation: Formula-based logic using holding periods (12m/24m/36m) and LTCG tax rates.

10. Section 80C Deduction Planner

Logic-Based (Built)

Tracks EPF, PPF, ELSS, Insurance, Home Loan Principal up to ₹1,50,000 ceiling limit and calculates net tax saved.

Reference:
✅ Implementation: Simple interactive math slider & category checklist.

3. PAN Card & TDS Tools (4 Tools)

11. TDS Rate Chart Finder

Database / Chart Search

Searchable directory of TDS sections (194C, 194J, 194I, 194H, 194Q) with threshold limits and applicable rates.

References:
📋 Client Input Needed: Provide latest FY TDS section master rate chart table.

12. TDS Calculator (Salary / Rent / Contractor)

Logic-Based (Built)

Calculates TDS deduction amount based on payment type (Contractor 1%/2%, Professional 10%, Rent 5%/10%, Property 1%).

Reference:
✅ Implementation: Section dropdown + payment input → auto-calculates TDS and net payout.

13. PAN Card Status Checker

❌ Not Feasible (No API)

Attempting to check live PAN application status or NSDL/UTIITSL tracking publicly.

❌ Status: Not Feasible. NSDL/Protean and UTIITSL do not provide a free or public API for third-party websites due to security & OTP restrictions.

14. TDS Due Date Calendar

Database / Rule-Driven

Quarterly TDS return filing due dates (24Q, 26Q, 27Q) and monthly TDS deposit due date calendar (7th of every month).

📋 Client Input Needed: Provide complete TDS due date schedule list for current financial year.

4. Bookkeeping & Payroll Tools (3 Tools)

15. Take-Home Salary / CTC Calculator

Logic-Based (Built)

Breaks down Gross CTC into Basic, HRA, Special Allowance, EPF deduction, Professional Tax (PT), and Net Monthly Take-Home.

Reference:
✅ Implementation: Built-in Indian payroll formula (Basic 50%, EPF 12%, PT ₹200/mo).

16. Salary Slip Generator

Interactive Tool

Generates printable PDF payslip with company logo, employee details, earnings, and deduction table.

Reference:
✅ Implementation: Client fills form → live HTML payslip preview → 1-click PDF download via browser print.

17. PF / EPF Corpus Calculator

Logic-Based (Built)

Projects total EPF accumulation at retirement based on current basic salary, monthly contribution (12%), annual raise, and EPFO interest rate (8.25%).

Reference:
✅ Implementation: Compound interest compounding formula.

5. Corporate, Loans & Investment Tools (6 Tools)

18. Company Name Availability Checker

Paid API Integration

Checks MCA (Ministry of Corporate Affairs) database and Trademark registry for proposed company name conflicts.

🔑 Paid API Required: MCA does not offer free public name search API. Requires third-party MCA verification API (e.g. Surepass.io ↗ or Sandbox API).

19. Director DIN Lookup Tool

Paid API Integration

Fetches Director Name, active status, and linked company directorships using 8-digit Director Identification Number (DIN).

🔑 Paid API Required: Requires MCA DIN Lookup API key from third-party data provider (Surepass / Signzy).

20. Loan EMI Calculator

Logic-Based (Built)

Calculates monthly EMI, total interest payable, and amortization chart for Home, Personal, Auto, or Business Loans.

Reference:
✅ Implementation: Standard banking formula `[P × r × (1+r)^n / ((1+r)^n - 1)]`.

21. Loan Eligibility Calculator

Logic-Based (Built)

Estimates max loan amount based on monthly income, existing EMIs, FOIR ratio (50%), and tenure.

Reference:
✅ Implementation: Banking FOIR multiplier formula.

22. MUDRA Loan Eligibility Checker

❌ Not Feasible (No API)

Attempting automated automated eligibility check for Shishu (up to ₹50k), Kishor (up to ₹5L), Tarun (up to ₹10L) MUDRA loans.

❌ Status: Not Feasible via API. Government MUDRA portal does not offer a public eligibility API. Converted to a static decision-tree guide or form lead capture.

23. SIP Calculator

Logic-Based (Built)

Calculates wealth gain and expected maturity corpus for monthly Systematic Investment Plans over 1–30 years.

Reference:
✅ Implementation: Standard compound interest SIP formula.

6. Digital, SEO & Marketing Tools (7 Tools)

24. Website Audit & Speed Score Checker

API Integration

Fetches website performance score, Core Web Vitals, and page speed audit from PageSpeed Insights.

Reference:
🔑 API Key Needed: Integrates Google PageSpeed Insights API (Free tier available from Google Cloud Console).

25. Domain Availability & Suggestions

Paid API Integration

Checks WHOIS availability for .com/.in domain names and generates AI name suggestions.

🔑 Paid API Required: Requires WHOIS lookup API (e.g. Domainr API / WhoisXML API key).

26. SEO Health Score Checker

API Integration

Analyzes meta title, description, h1 tags, mobile usability, and SSL status for any website URL.

Reference:
🔑 API / Scraper Backend Needed: Custom Rust backend scraper parses HTML tags and returns automated score breakdown.

27. Ad Budget Planner Quiz

Pending Quiz Inputs

Interactive multi-step questionnaire recommending monthly Google/Meta Ads budget based on industry, target CPC, and sales target.

References:
📋 Client Input Needed: Provide exact quiz questions, options, industry CPC benchmarks, and budget recommendation rules.

28. Google Ads ROI Calculator

Pending Strategy Inputs

Calculates estimated ROAS (Return on Ad Spend), Cost Per Lead (CPL), and profit margin based on ad spend and conversion rates.

📋 Client Input Needed: Need client's preferred formula inputs (Ad spend, Cost per click, Conversion %, Average Order Value).

29. Content Calendar Generator

Pending Template Inputs

Generates 30-day social media & blog content topic ideas filtered by industry and goal.

📋 Client Input Needed: Provide content topic templates or prompt structure for AI generation.

30. GEO / SEO Readiness Checker

Pending Quiz Inputs

Evaluates website readiness for Generative Engine Optimization (ChatGPT, Perplexity, Google AI Overviews).

📋 Client Input Needed: Provide 8–10 diagnostic questions and scoring weights to evaluate GEO readiness.