Only what you need
Start with the base for invoices, e-invoices and supplier invoices, and add only the modules your work needs. That is exactly what you pay for.
TWT Custom
Start from the invoicing base and add modules: projects, scanner, banking, designer, API. Each module has its own price, and the total stays visible.
The base writes invoices and e-invoices and takes in your suppliers' invoices. Everything else you add as your work needs it, from quotations to the receipt scanner and time tracking, and after you sign in you find exactly the modules you chose. In the browser, on the tablet and as an app.
from 9,00 € per month, net, plus VAT
30 days to test: cancel within them and you pay nothing; if you continue, the trial month is charged with the first month. Cancel monthly. You pay for the base and the modules you choose.The trial is available once per customer.




Why TWT Custom
Start with the base for invoices, e-invoices and supplier invoices, and add only the modules your work needs. That is exactly what you pay for.
Every module names its monthly price, and the total is added up while you choose. It stands beside your choice before you order.
Add a module when your business needs it, charged to the day for the month that is running, and cancel any module on its own. Your data stays where it is.
Features
Every package starts from the same base, and you add the modules your work needs on top. All prices are net per month, and the full menu is listed in detail below.
DashboardDashboard
What needs doing today and the figures behind it, cut to your package: invoices, supplier invoices awaiting approval, hours and projects, or the books. Plus a guided first-run checklist.
SalesQuotations
Quotation, order confirmation and delivery note in one chain — each turns into the next with one click, each on its own number circle.
SalesInvoices
Draft to finalized, line items with per-line VAT and UN/ECE units, signature capture, QR code, duplicate and bulk actions.
SalesRecurring
The same invoice, every month, written once. Weekly to yearly, ending on a date or after a count. Either as a draft for approval, or issued and sent automatically — with the number sequence staying gapless.
SalesE-Invoice
E-invoices to the German standard: generate, convert, read and validate ZUGFeRD and XRechnung against EN 16931.
SalesCustomers
Buyer master data including VAT ID, flowing straight into the e-invoice as BT-48.
SalesPayment Terms
Agree your terms once and choose them on every document. Several discount levels — 3 % within 7 days, 2 % within 14, net 30 — with the deadlines and the amount to pay worked out for you.
SalesReminders
Up to three reminder stages with their own deadlines and fees. Default interest under § 288 BGB — nine points over the base rate against a business, five against a private person, day-exact and calculated separately across each interest period. Plus the 40-euro flat charge where it is due.
PurchasingIncoming invoices
Receive, check and approve your suppliers’ invoices — a photograph, a PDF or an XRechnung, all in the same inbox. Being able to receive them has been obligatory since 2025; issuing them only from 2027.
PurchasingSuppliers
Your creditors with their account mapping and every bank account they have ever invoiced from — what makes the changed-IBAN warning possible.
AccountingBanking
Import CAMT.053, MT940 or CSV from your bank; a matching transaction marks the invoice paid and settles the booking behind it.
ProjectsTime tracking
Record hours with the timer while you work, or by hand afterwards. The rate comes automatically from the activity or the project and then stays on the entry, so a later price rise does not re-price weeks already worked. Open hours become an invoice at the press of a button.
ProjectsProjects
What is being worked on, with its customer, rate and budget. The analysis shows per project what has been earned, what has been billed and — the figure that matters — what has not. Internal projects with no customer belong here too: not every hour is sellable, but every hour wants to be seen.
ProductsCatalog
Products and services in one item master with unit, price, VAT rate, SKU and sector.
ProductsStock
The quantity on hand per article with a minimum level and a storage location; what is below its level stands at the top.
ProductsStock movements
Every change as an entry with date, quantity and reason: goods received, sold from the invoice, returned, corrected, counted.
ProductsInventory count
Count, see the system quantity and the difference, complete — the stock is set to what was counted.
DocumentsScan
Five-step wizard: capture, adjust, process, review, export — a photographed receipt becomes a compliant e-invoice.
DocumentsDocuments by email
Your own address for supplier invoices. Hand it out, or forward your existing mailbox to it — what arrives is read, checked and approved like a document you uploaded. With a sender list, format and size limits, and a log that names the refused messages too, so no supplier is left sending into nothing.
DesignTemplates
Template library — duplicate, publish, set a default, mark a company-neutral standard.
DesignInvoice → Template
Upload an existing invoice PDF and get back an editable layout, plus detected customer, logo and company.
DesignDesigner
Drag-and-drop PDF editor with tables, totals, QR code, barcode, signature, data fields and undo/redo — without any programming knowledge.
DesignEmail templates
The covering note your invoice arrives with — in your words, not ours. A designer with formatting, colors, tables and placeholder chips, for eleven kinds of mail in German and English, with a signature and attachment rules. One template can serve several document types at once, individual customers can have their own, and each person can set a personal default. The preview shows what will be sent, the test mail sends it to you first, the history keeps every earlier state, and a misspelled placeholder is refused at save rather than printed at your customer. The send log records what actually went out — including what did not arrive.
AdministrationCompanies
Full legal profile: register data, tax numbers, banking, branding and § 19 UStG small-business mode.
AdministrationUser Management
Invitations, access levels, per-user permission overrides and ownership transfer.
AdministrationTax advisor
Who, besides your own people, may reach your data. A practice asks, you decide, and you can withdraw the access at any time — your own users are untouched.
AdministrationImport data
Switch without retyping: customers, suppliers, the catalogue and your open items from a CSV file, as sevdesk, Lexware Office, Papierkram and Excel export them. Semicolons, umlauts and German numbers are recognised and the columns map themselves — with a dry run first and all-or-nothing on the way in.
AdministrationNumbering
Four independent number circles — invoices, quotations, order confirmations, delivery notes — each with prefix, format, padding and a yearly or monthly reset, with a live preview.
AdministrationTwo-factor requirement
Whether a second factor stays voluntary, is required of everyone, or only of the access levels that can move money. Setting one up stays on each person’s own profile, and that page stays reachable so nobody is locked away from the requirement they have to meet.
AdministrationBilling
Plan and single-module subscriptions paid by card — the payment itself switches the module on.
AdministrationTWT invoices
Every invoice from TWT in one place, across all modules, with the payment status per module and each invoice as a PDF.
AdministrationCancellation
Contract, end of term and cancellation in one place. Paid time stays usable to the end of the period, and the cancellation can be withdrawn until then.
AdministrationAudit Logs
21 action types across 21 entity types, filterable and CSV-exportable, surviving deletion.
AdministrationIntegrations
API keys and webhooks: other systems read and write through the same interface the portal uses, with the same permissions — and get told when something happens.
AdministrationSupport
Help from inside the product: ask a question, attach a screenshot, read the answer in the same thread. Each person sees only their own requests.
AdministrationNotifications
Where the product writes to: e-mail, Telegram or WhatsApp — one set for the company, and one of their own for each person. With a test message, so a wrong number is caught at once instead of staying silent.
How it works
Real screens from TWT Custom with example data: a heating and plumbing business whose package holds every module on offer. The base first, then what the modules add.

01 In the base

02 In the base

03 Quotations · €6.00 a month

04 Projects and time · €8.00 a month
Receipt scanner · €6.00 a month
Take a picture of a receipt or upload it. The scanner finds its edges, straightens it and reads it on our own servers.

Invoices, e-invoices and supplier invoices
Chosen one by one, each at its price
Beside your choice, before you buy
Exactly the modules of your package
Who it is for
The base alone is often enough: invoices, e-invoices and your suppliers' invoices.
Projects and time for the fitters' hours, and the receipt scanner for the till receipt from the builders' merchant.
Quotations that become orders, and recurring invoices for maintenance and service contracts.
Start small and add a module as soon as the work asks for it.
The API and webhooks connect your other systems, with the same rights as the portal.
Requirements
Every TWT Custom package supports you with the requirements for invoices and receipts in Germany.
Since 2025 every business in Germany must be able to receive e-invoices. XRechnung and ZUGFeRD arrive in your inbox, checked against EN 16931.
From 2027 businesses with more than €800,000 turnover must send e-invoices, from 2028 every business. The base of TWT Custom writes XRechnung and ZUGFeRD today.
An issued invoice is numbered without gaps and locked, as the GoBD require. A correction is a cancellation invoice with reference to the original, never a deletion.
Invoices and receipts must be kept for eight years since 2025 (§ 14b UStG, § 147 AO). In TWT Custom an issued invoice stays as it was issued, and a supplier invoice keeps the original file it arrived as.
TWT Custom provides functions for proper invoices and records. The tax obligations of your business remain yours; when in doubt, ask your tax adviser.
Devices
TWT Custom runs in your browser on every computer and tablet, and on Android in the TWT One app.

A package of your own uses the TWT One app for Android. It opens the modules of your package, such as quotations, the clock for the job and invoices on the move; a module you have not chosen shows in the menu as "not in your plan". The app for iPhone and iPad is in preparation.

In the browser, with the whole portal: the overview with the supplier invoices, the projects and the hours.

On your computer or laptop, with nothing to install.
Getting started
Tick your modules in the configurator, enter your company and bring in your customers and suppliers from a CSV file.
25 common payment terms and a standard invoice template are already set up.
If you have questions, our support team helps you personally.
Get startedPricing
TWT Custom
from 9,00 €the base, net per month, plus VAT
In every package
TWT One
If you would pick most of the modules anyway, TWT One brings all of them for one monthly price, and with them the bookkeeping and the reports that no package of your own contains.
TWT Custom is part of the TWT One ecosystem.
Discover TWT One →A closer look
E-invoicing and the rights of every single person come with every package. The receipt scanner and time tracking are shown as they work once you choose them.
Generate ZUGFeRD EN 16931 (Comfort), XRechnung 3.0 or pure XRechnung XML, or convert an existing PDF. Upload an XRechnung XML or a ZUGFeRD/Factur-X PDF and get a report covering XSD schema, EN 16931 business rules, the German CIUS, PDF/A-3 conformance and XML embedding.

Photograph or upload an invoice. The receipt edge is detected automatically, layout and fields are read, units are inferred from a German keyword dictionary, and gross/net totals are reconciled against the printed total — then exported as ZUGFeRD or XRechnung.

Anyone selling their work by the hour usually keeps the hours in a spreadsheet — and that spreadsheet is then really where the invoice comes from. Here the two belong together: recorded time becomes an invoice line without anybody retyping anything.

More than 130 permission keys, organised as a module → component → action tree. Every member starts with the rights of their role; on top of it you grant or withhold single rights for exactly that person, and a withheld right always wins.
Company Role: Power User· 68 from the role68/102
FAQ
Invoices with payment terms and dunning, e-invoices as XRechnung and ZUGFeRD, your suppliers' invoices with checks and approval, plus customers, suppliers, templates and user management. The base costs €9.00 net per month and is part of every package.
Receipt scanner €6.00, quotations €6.00, recurring invoices €4.00, projects and time €8.00, designer €8.00, banking €12.00, and API and webhooks €12.00, each net per month. The configurator shows the total beside your choice before you order.
Yes. On the billing page you add a module whenever you need it, charged to the day for the month that is running. Every module can also be cancelled on its own while the others keep running.
No. The journal, the advance VAT return and the reports are not among the modules you can choose. They are in TWT Accounting, and in TWT One, which holds every module.
Yes, in every package. The base issues invoices as XRechnung or ZUGFeRD according to EN 16931, and your suppliers' e-invoices arrive by e-mail or upload, are checked against EN 16931 and go to the right person for approval.
The TWT One app for Android. It opens the modules of your package; a module you have not chosen shows in the menu as "not in your plan". The app for iPhone and iPad is in preparation.
When your package would hold most of the modules, or when you want to keep your books as well. TWT One contains every module and the bookkeeping for one monthly price.
Yes. You test it for 30 days: cancel within them and you pay nothing. If you continue, the trial month is charged together with the first month; after that you pay for the base and your modules monthly, with no setup fee, and you can cancel monthly.
30 days to test: cancel within them and you pay nothing. Then cancel monthly, with no setup fee. Your data stays on our own servers in Germany.