Help Center › Daily Work › Parties — customers & suppliers
Parties — customers & suppliers
A ‘party’ is anyone you bill or buy from. Save them once with their GSTIN and you'll never re-type details — and you get a running ledger of every transaction and balance.

Read this first
- ▸ Add a customer or supplier once; their details auto-fill on every bill.
- ▸ Each party has a ledger — every invoice, payment and the exact outstanding balance.
- ▸ GSTIN, state and place-of-supply are captured so GST is always correct.
Step by step
- 1
Add a party
Parties → NewEnter name, type (customer/supplier), GSTIN and state. You can also add one on the fly while billing.
- 2
Open a party ledger
Click a party to see every transaction and what they owe (or you owe them).
- 3
Set credit terms
Add a credit limit and payment terms so due dates and reminders work for you.
Customer, supplier — or both
A ‘party’ is anyone you do money business with. The same party can be a customer (you bill them) and a supplier (you buy from them) — MGH Books keeps both sides on one ledger so the net position is always clear.
What to save (and the GSTIN question)
You only set a party up once. Here's what each detail does.
| Field | What it's for | Needed? |
|---|---|---|
| Name | Appears on invoices and statements | Yes |
| Type | Customer, supplier or both | Yes |
| GSTIN | Makes a B2B tax invoice; lets them claim ITC | For B2B |
| State | Decides CGST/SGST vs IGST | Yes |
| Contact | For WhatsApp/email invoices & reminders | Recommended |
| Credit terms & limit | Sets due dates and risk control | Optional |
The party ledger: your single source of truth
Open any party to see their ledger — every invoice, payment, credit note and the running balance. It answers the two questions that matter instantly: how much do they owe me (or I owe them), and what's it made of.
Click any line to drill into the exact document behind it. No more digging through files to settle a ‘what's my balance?’ conversation.

Credit terms & limits
Set payment terms (e.g. ‘due in 15 days’) and a credit limit per party. Due dates then drive your receivables ageing and reminders, and you're warned before extending credit beyond the limit.
Finding parties fast
As your list grows, search by name, GSTIN or phone, and group parties (e.g. by area or type) so billing and follow-ups stay quick.
Troubleshooting
A party's GSTIN won't save
Fix: GSTINs are exactly 15 characters — check for spaces, a missing digit or a lowercase letter.
The same party appears twice
Fix: You likely created them on the fly with a slightly different name. Merge or archive the duplicate and bill against one.
A balance looks wrong
Fix: Open the ledger and scan for a missing receipt or a duplicated invoice; click any line to verify the document.
Words you’ll see (in plain English)
- Party
- Any customer or supplier you transact with.
- Ledger
- The running history of one party — every entry and the balance.
- GSTIN
- A customer/supplier's 15-character GST number.
- Credit limit
- The most you'll let a customer owe before pausing further credit.
- Receivable / Payable
- Money owed to you / money you owe.
Ready to try it?In the app, open the More menu → Parties.
Open Parties