Best Invoicing and Proposal Software for Interior Designers (2026)
Compare proposal and invoicing software for interior designers, including Atelier, Studio Designer, Programa, Mydoma, Houzz Pro, and Densy. Evaluate schedule-based documents, client pricing, trade discounts, deposits, partial billing, payments, and accounting.
The best invoicing and proposal software for an interior designer must handle design-specific pricing and reuse the FF&E data already stored in the project.
- Studio Designer is the accounting-led option.
- Atelier generates proposals and invoices from connected schedule data.
- Programa provides client documents inside a mature studio workflow.
- Mydoma Studio combines invoicing and orders with a client portal.
- Houzz Pro includes proposals, invoicing, and payments inside a broad business suite.
- Densy provides a lighter document and export workflow.
The decisive question is whether products, quantities, client prices, markup, discounts, shipping, tax, deposits, and payment milestones remain connected—or must be copied into a separate billing document.
Why generic invoicing tools fail designers
An interior design invoice is not a normal invoice, and the differences are structural rather than cosmetic.
There are two prices for every item. A list price, and a client price after your trade discount and markup. The client must see one and never the other. A tool with a single price field forces you either to expose your margin or to keep the real numbers somewhere else — and “somewhere else” is invariably a spreadsheet that stops matching your invoices by week four.
Discounts vary per vendor account. Not one trade rate across the business — a different rate at each supplier, sometimes several accounts at the same supplier for different project types. The right rate has to attach to the right item automatically, or you are doing per-line arithmetic by hand.
Money moves before goods do. Deposits are paid against items that have not shipped. A payment needs to attach to specific items so you can see what is covered and what is exposed. General invoicing tools model a bill, not a pipeline.
Billing is progressive and mixed. A design fee billed by phase or hourly, plus goods billed at order and delivery, plus shipping and tax that arrive late and change. Each of those is a partial invoice against a moving schedule.
None of this is exotic — it is the standard shape of a design practice. It is simply not what FreshBooks was built for.
The dividing line: books inside or outside
This is the single most consequential question in the category, and worth answering before looking at any feature list.
Books inside the platform. Studio Designer includes full general ledger accounting on every tier. Your invoices, payments and ledger live in one system, and you may not need separate bookkeeping software at all.
Books outside the platform. Programa, Mydoma, Densy and Atelier generate proposals and invoices from project data, then hand off to QuickBooks or Xero for the accounting proper. Mydoma integrates with QuickBooks directly.
Neither is better in the abstract. Buying the wrong side is expensive in opposite ways: buy accounting depth you do not need and you pay for a steep learning curve to run a system your bookkeeper already covers; buy a platform that stops at invoicing when you needed a ledger and you end up with the reconciliation problem you were trying to solve.
The honest test: do you have a bookkeeper or accountant you are happy with? If yes, you almost certainly want books outside and should optimise for how cleanly invoices leave the platform. If your books are a genuine mess and consuming your evenings, Studio Designer earns its learning curve.
Compared
| Tool | Document workflow | Accounting model | What to verify |
|---|---|---|---|
| Studio Designer | Proposals and invoices inside an accounting-led platform | Deeper built-in financial workflow | Onboarding, payment processing, and document flexibility |
| Atelier | Proposals and invoices generated from FF&E schedule data | General ledger handled elsewhere | Accounting handoff, deposits, and partial billing |
| Programa | Proposals and invoices inside a mature studio workflow | Books handled separately | Export and reconciliation workflow |
| Mydoma Studio | Mydoma Studio combines invoices and orders with a client-portal-centered workflow and accounting integrations. Verify current integration scope, plans, and onboarding directly with the vendor. |
Atelier
Our product, so weigh accordingly. Built for interior designers and architects, the specific claim here is narrow: proposals and invoices generate from the FF&E schedule you already built, rather than being rebuilt in a document.
The schedule already holds the products, quantities and prices, so a proposal comes out of it without re-entering a line. Send it as a live link; clients review, comment and accept without an account, and the issued proposal stands as the document of what was agreed. The procurement side carries client-facing markup, trade discounts, shipping and tax on every line, with multiple trade accounts per vendor each holding its own discount and the right account applied to the right project automatically. Payment milestones and time tracking sit alongside.
Stated plainly: Atelier is not an accounting replacement. Atelier is designed to work alongside the studio’s accounting and payment systems rather than replace the general ledger. Verify current integrations and export options before implementation. If you need a general ledger today, Studio Designer is the honest recommendation.
Atelier uses per-seat pricing. Verify current plan details on the Atelier pricing page. It launched in 2026 and does not replace general ledger accounting or 3D rendering software.
Houzz Pro and Densy
Houzz Pro includes proposals, invoicing and payments within a broader suite that also covers lead generation. Densy is lighter here — strong on exports, including Excel with formulas, but not built as a billing system; its free plan makes it easy to establish whether that matters for you.
What to check before buying
Two price fields. List and client price as separate values, with discount and markup calculated behind them. If there is one price field, walk away or plan for a spreadsheet.
Discount attaches to the vendor account. Multiple accounts per vendor, each with its own rate, applied automatically. Doing this by hand is the most reliable source of margin errors in a design practice.
Deposits attach to items. Not just an amount received, but which items it covers. Otherwise you cannot answer what is exposed if a client stops paying mid-project.
Partial billing does not mean rebuilding. Invoice half a schedule at order and the rest at delivery without reconstructing the document. Test this specifically; it is common and often clumsy.
Export shape. If books live elsewhere, how do invoices actually get there — a proper integration, a CSV, or copy and paste? This is the difference between a five-minute month-end and a lost afternoon.
Disclosure: Atelier is our product. This article states plainly that Atelier is not an accounting system and that Studio Designer extends further into the financial workflow. The pricing, deposit, and accounting-handoff checks apply to any platform. Features and pricing change frequently; verify current details with each vendor.
Atelier is free to try, no credit card. Start a project and generate a proposal from a schedule to see how much retyping disappears.
Frequently asked questions
- What is the best interior design invoicing and proposal software?
- Studio Designer is the accounting-led option when proposals and invoices must connect to a full general ledger. Atelier, Programa, Mydoma Studio, and Houzz Pro generate client documents inside broader project workflows while accounting may remain elsewhere. Choose by how directly schedule data becomes a proposal or invoice, how deposits and partial billing are handled, and how transactions reach the books.
- Can I use QuickBooks or FreshBooks for interior design invoicing?
- For the accounting side yes, and most studios do. Where generic tools fall short is the design-specific math: trade discounts that differ per vendor account, the distinction between list price and client price, markup applied per item or category, deposits against not-yet-ordered goods, and progress billing against phases. You can force these through a general invoicing tool, but you will be maintaining the real numbers somewhere else and copying them across.
- Do interior design platforms replace QuickBooks?
- Usually not. Some accounting-led platforms provide deeper bookkeeping, while many design platforms generate proposals and invoices but expect the general ledger to remain in dedicated accounting software. Verify current accounting integrations, exports, payment processing, and reconciliation workflows before choosing.
- How should interior designers handle deposits and progress billing?
- Most studios bill a design fee separately from goods, take deposits before ordering, and invoice the balance at or after delivery. The software requirement is that deposits attach to specific items so you can see what is covered, and that partial billing does not force you to rebuild an invoice by hand. Payment milestones and a procurement pipeline that knows what has been ordered but not paid are what make this manageable at volume.
- What should a design proposal include?
- At minimum: scope, the products with quantities and client prices, any design fee and how it is calculated, taxes and shipping, payment terms including deposit, and a clear approval mechanism with a date stamp. The efficiency question is whether it generates from your FF&E schedule — which already holds products, quantities and prices — or whether you rebuild it in a document each time. Rebuilding is where errors and evenings go.
- Should the proposal show trade discounts to the client?
- Almost never, and this is precisely why generic invoicing tools cause trouble. You need list price and client price as separate fields, with your trade discount and markup calculated behind them but not displayed. A tool that has only one price field forces you to either reveal your margin or maintain the real numbers in a separate spreadsheet — which is how studios end up billing from a document that no longer matches their schedule.