The deal & payment OS for interior designers
Quotation, e-signed agreement, milestone invoices and payment chasing on one thread — built for the way Indian interior studios actually run projects. Paste the client's WhatsApp chat; it drafts the deal.
One thread from quotation to payment
Every document is generated from the one before it, so the numbers never drift between your quotation, your agreement and your invoice.
Generated from the deal record — itemised deliverables, terms, a stable number (QT-series) and a clean PDF in your name.
The accepted quotation becomes an agreement with the same figures. Electronic acceptance is recorded — who, when, which signature.
Billed from the agreement — advance/balance or milestones — and DealInSec won't let you invoice more than the agreement is worth.
Overdue, due this week, signed-but-not-invoiced — the dashboard tells you what is collectible today.
Where interior projects leak money
It's never the design that costs you — it's what happens around it. A ₹8 lakh project agreed on WhatsApp, "just one more change" a dozen times, an advance taken with no written scope, and a final payment that never comes because nobody can prove what was agreed. DealInSec closes every one of those gaps.
Paste the client's WhatsApp conversation and the Copilot drafts the deal — client, rooms, scope, amount, advance terms. You confirm; it never invents a number you didn't say.
Before you send, a Protection Check flags the gaps designers bleed on — no revision limit, no exclusions (civil work, furniture), no advance — and suggests the terms to add.
Bill 50% advance, stage payments, balance on handover — each invoice tied to the signed agreement, and never more than the project is worth.
The Copilot drafts the follow-up for an overdue payment — English or Hinglish — using the real invoice number. You press send; it never messages a client on its own.
Use the free quotation maker or grab a ready interior quotation template — no sign-up. The app is for when you're running projects every month and want them all on one thread.
WhatsApp + Excel vs DealInSec
| WhatsApp + Excel + memory | DealInSec | |
|---|---|---|
| The scope | Agreed verbally, argued later | E-signed agreement with revision limits & exclusions |
| Extra work | "You said you'd change it for free" | A change-order quotation before it's executed |
| Milestone invoices | Retyped each time, drift creeps in | Generated from the agreement, always consistent |
| The final payment | Chased awkwardly, or never | The dashboard shows what's overdue; the Copilot drafts the nudge |
Guides for interiors: interior quotation format · client not paying — the written-trail method.
Frequently asked questions
Is DealInSec built for interior designers?
Yes — it's the sharpest fit. Interior projects are high-value and milestone-billed, with scope that shifts constantly, which is exactly what DealInSec manages: quotation → e-signed agreement → stage invoices on one thread, with scope-creep protection and payment tracking. It works for adjacent studios (architects, contractors, agencies) too.
Can it handle stage-wise / milestone billing?
Yes. Bill a 50% advance, stage payments, and a balance on handover — any split — with each invoice tied to the signed agreement, and DealInSec won't let you invoice more than the project is worth.
How does it stop scope creep?
Two ways: the agreement records the exact deliverables, revision limit and exclusions the client accepted; and the Protection Check flags when those are missing before you send. Extra work becomes a change-order quotation instead of a free favour.
Does it create GST invoices for my studio?
In-app invoices record the agreed value and print your PAN and GSTIN, but they are not Rule-46 GST tax invoices. For a GST tax invoice with CGST/SGST/IGST computed, use the free GST invoice generator — no sign-up.
What does it cost?
A 7-day Pro trial with no card, then a free plan covering 4 deals a month. Pro is ₹999/month or ₹9,999/year — less than one forgotten milestone invoice — with unlimited projects, agreements, invoices, payment tracking and 5 team seats.