What should a consultant invoice include in India?
Include your business details, client details, unique invoice number, invoice date, consulting services, applicable SAC/GST information, total amount, due date, and payment details.
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What to know about invoice template consultant India
Should consultants use hourly or project-based invoice line items?
Either works. Use hours and rates when billing by time; use milestones or deliverables when charging a fixed project fee.
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🎯 For Consultants · Free Template
Consultant Invoice & Bill Format Template for India (Free, GST-Ready)
Project-based, retainer, and daily-rate invoice formats for Indian consultants — with the correct SAC codes, GST fields, and professional wording.
📖 6 min read·By InvoicePilot Team
Create your consulting invoice in 60 seconds
GST auto-calculated, PDF download, email to client — free forever.
SAC codes for consultants in India
| Consulting Type | SAC Code | GST Rate |
|---|---|---|
| Management consulting | 998311 | 18% |
| IT consulting / advisory | 998312 | 18% |
| Business consulting | 998311 | 18% |
| HR consulting | 998313 | 18% |
| Financial advisory | 998399 | 18% |
| Legal consulting | 998211 | 18% |
| Marketing consulting | 998311 | 18% |
Consultant invoice, consulting bill, consultancy invoice format and consultancy bill format all refer to the same document — these terms are used interchangeably across India, and the GST requirements don't change based on which one you use.
Individual Consultant vs Consultancy Firm — Invoice Format Differences
The invoice format itself doesn't change based on whether you're an individual consultant or a registered consultancy firm — the required fields (GSTIN, SAC code, tax breakup, invoice number) are the same either way. What differs is whose details go on the invoice: an individual consultant lists their own name (or a proprietorship trade name) and, where GST-registered, their GSTIN, while a consultancy firm lists the registered company name, company GSTIN, and often an authorized signatory. If you bill under your own name without a registered firm, you still follow the same SAC code and GST rules covered above.
Template 1 — Project-based consulting invoice
Use for fixed-scope engagements — strategy projects, audits, assessments.
Zoyo Consulting
Mumbai, Maharashtra · GSTIN: 27XXXXX1234X1Z5
zoyo@mehconsult.in · +91 98000 00000
SAC: 998311 (Management Consulting)
TAX INVOICE
INV-2026-021
10/03/2026 · Due: 24/03/2026
Bill To
GrowthCorp Pvt. Ltd., Pune, MH
Same state (MH → MH) — CGST + SGST
| Description | SAC | Amount |
|---|---|---|
| Go-to-market strategy consulting (April 2026) | 998311 | ₹75,000 |
| Competitive landscape research & report | 998311 | ₹25,000 |
Subtotal₹1,00,000
CGST 9%₹9,000
SGST 9%₹9,000
Total₹1,18,000
Template 2 — Monthly retainer invoice
Use for ongoing advisory relationships billed monthly.
Zoyo Consulting
SAC: 998311 · GSTIN: 27XXXXX1234X1Z5
TAX INVOICE
INV-2026-022 · March 2026 Retainer
| Service | Period | Amount |
|---|---|---|
| Advisory retainer — 8 hrs/month @ ₹5,000/hr | March 2026 | ₹40,000 |
| Board meeting preparation & materials | March 2026 | ₹10,000 |
Subtotal₹50,000
IGST 18%₹9,000
Total₹59,000
Template 3 — Daily-rate consulting invoice
Use for on-site advisory days, workshops, or audits billed per day rather than per project or per month. Prefer not to fill in a template by hand? Generate this instantly with our free invoice generator.
Zoyo Consulting
Mumbai, Maharashtra · GSTIN: 27XXXXX1234X1Z5
SAC: 998311 (Management Consulting)
TAX INVOICE
INV-2026-023
15/03/2026 · Due: 29/03/2026
Bill To
GrowthCorp Pvt. Ltd., Pune, MH
Same state (MH → MH) — CGST + SGST
| Description | Days | Rate/Day | Amount |
|---|---|---|---|
| On-site strategy advisory | 4 | ₹15,000 | ₹60,000 |
| Workshop facilitation & report | 1 | ₹15,000 | ₹15,000 |
Subtotal₹75,000
CGST 9%₹6,750
SGST 9%₹6,750
Total₹88,500
Consultant-specific invoice tips
✦
Always include deliverables in the description
Don't just write "consulting services". Write "3 strategy workshops + written GTM playbook + 2 rounds of review". This prevents scope disputes.
✦
Separate your time from expenses
Bill professional fees and reimbursable expenses (travel, tools) as separate line items. Clients appreciate the clarity and it's cleaner for their bookkeeping.
✦
Retainer invoices should be sent on the 1st
Send monthly retainer invoices on the 1st of each month — before you do the work. Never work a full month and invoice at the end.
✦
Include a "scope exclusions" note
"This invoice covers strategy advisory only. Implementation, recruitment, and ongoing execution are billed separately." Prevents "I thought this included X" conversations.
Frequently asked questions
What SAC code should a consultant use on their invoice?
It depends on the type of consulting: management consulting is 998311, IT consulting/advisory is 998312, HR consulting is 998313, and financial advisory generally falls under 998399. Use the code that best matches the specific service delivered.
Should a consultant invoice hourly, per project, or as a retainer?
It depends on the engagement: short, well-defined work suits project-based or hourly billing, while ongoing advisory relationships are usually better served by a monthly retainer — whichever you choose, state it clearly on the invoice with the relevant hours or scope covered.
Is GST charged on consulting services in India?
Yes, standard consulting services are taxed at 18% GST, split as CGST+SGST for same-state clients or as IGST for clients in a different state — with the usual zero-rated exception for genuine exports of consulting services to clients outside India.
Do individual consultants need a different invoice format than consultancy firms?
An individual consultant lists their own name or proprietorship trade name and, where GST-registered, their GSTIN, while a consultancy firm lists its registered business name and GSTIN.
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