Most freelancers in Thailand are running their business across a small pile of apps that were never designed to talk to each other. Projects live in Notion. Time tracking happens in Toggl. Invoices get cobbled together in Excel or FlowAccount. Then tax season arrives and the scramble begins, chasing withholding tax certificates from clients who sent them to the wrong email six months ago. It is exhausting, and it is completely avoidable.
Kitslancer is a workspace built specifically for Thai freelancers, created by Krit, a Thai freelance developer who got tired of the same juggling act. The platform replaces seven separate tools with one free workspace that handles project management, CRM, time tracking, Thai-language invoices with PromptPay QR codes, automatic 3% withholding tax (WHT) calculations, and quarterly ภ.ง.ด. 90/94 tax estimates. Everything in one tab.
What makes this different from generic Western SaaS tools is the specificity. Kitslancer was built around the Thai freelance context: PromptPay payments, the 50 ทวิ WHT certificate problem, Fastwork platform fees, and the personal income tax forms that catch freelancers off guard every March. No amount of Notion customization was going to solve that.
What Kitslancer Actually Does
Automatic WHT and Tax Tracking
Every invoice issued through Kitslancer automatically records the 3% withholding tax deducted by the client. You can see at a glance which clients still owe a WHT certificate and exactly how much was withheld on each job. The platform also calculates your ภ.ง.ด. 90/94 quarterly tax liability and tells you how much to set aside each month. No more March surprises.
Thai Invoices and PromptPay QR
Invoices are generated in Thai, with a PromptPay QR code embedded for instant payment. You can also set up recurring invoices and share proposal links directly with clients. The whole document workflow, from proposal to paid invoice, runs inside a single platform without switching tools.
Project and Time Management in One View
Projects, tasks, kanban boards, time tracking, and expenses all live on one screen. A built-in timer starts tracking the moment you begin work, and logged hours automatically connect to the relevant invoice. The unified deadline calendar shows every proposal and invoice due date together, so nothing slips through quietly.
Per-Project Profit Visibility
This is the feature freelancers rarely get from generic tools. Kitslancer calculates real profit per project after deducting WHT, platform fees like Fastwork’s 10%, and your tool costs. You can finally see which clients and project types are worth repeating, and you have actual data behind any rate increase you want to make.
AI Assistant That Knows Your Data
The AI assistant built into Kitslancer is not a generic chatbot wrapper. It pulls from your actual account data to answer questions like which invoices are unpaid or how much you billed last month. Every figure it returns is traceable back to a specific invoice or note, and any change it proposes shows a confirmation card before anything is modified.
Chrome Extension for Fastwork Users
Kitslancer also publishes a free Chrome extension that works alongside your existing browser tabs. Once installed, you can start a timer, log a task, or add a note from any webpage without switching to the app. For freelancers who work through Fastwork, the extension lets you pin conversations, add tags, and hide clutter in your Fastwork inbox — all stored locally for your own reference. If you want to pull a client, project, or invoice into Kitslancer from Fastwork, that is available as an opt-in Pro feature. You choose what gets saved; nothing is pulled automatically.
Your Own Freelance Profile Page
Every Kitslancer account comes with a public profile page at app.kitslancer.com/u/your-username. This is not a marketplace listing — it is your own page, showing your services, rates, and portfolio. Clients can contact you directly through it, and the page is indexed by Google, so it can show up in search results. You can link to it from your Instagram bio, LINE profile, or business card and track how many people have visited or clicked through. Unlike a profile on a platform like Fastwork, you control it entirely and it exists outside any single marketplace.
Pim’s Tuesday Evening Problem
Pim is a freelance UI designer based in Chiang Mai. At 9 pm on a Tuesday in April, she wrapped up a checkout flow redesign for a Bangkok e-commerce client and needed to issue an invoice before the client’s end-of-month payment run closed. In the past, that meant opening FlowAccount, cross-referencing her Toggl time log, manually calculating the 3% WHT line, and then messaging the client separately with a bank transfer number.
Using Kitslancer, Pim opened the project she had been logging time against all week, reviewed the auto-calculated hours, and generated a Thai-language invoice with the WHT amount already filled in and a PromptPay QR code at the bottom. Total time from project screen to sent invoice: under four minutes. The platform flagged that this same client still had an outstanding WHT certificate from February, so Pim added a note to follow up. She also checked the quarterly tax estimate panel, which told her she should set aside ฿4,200 from this payment for her mid-year ภ.ง.ด. 94 filing. She transferred that amount to her savings account the same night, something she had never managed to do consistently before.
By 9:15 pm the invoice was sent, the tax reserve was handled, and the client paid via PromptPay the next morning.
How the Kitslancer Workflow Runs
Step 1: Set Up Your Projects and Clients Add clients to the CRM and create projects linked to each client. Assign tasks, deadlines, and priority scores so the platform can surface what needs attention first each day.
Step 2: Track Time and Expenses as You Work Start the built-in timer when you begin a task. Log expenses against the project as they happen. All of this feeds automatically into the financial summary for that project.
Step 3: Generate Proposals and Invoices When work is ready to bill, generate a Thai-language proposal or invoice directly from the project. WHT is calculated automatically, PromptPay QR is embedded, and the document is shareable via link.
Step 4: Monitor Tax Obligations Quarterly The tax dashboard calculates your ภ.ง.ด. estimate based on actual income recorded, tells you what to set aside, and tracks which clients have delivered their WHT certificates and which have not.
Pricing: Free Forever, With a Pro Option
Kitslancer is free with no credit card required and no time limit. A Pro plan is available at ฿399 per month or ฿3,490 per year. The site estimates that freelancers currently running Notion, Trello, Toggl, HubSpot, FlowAccount, Excel, and Linktree separately are spending around ฿2,680 per month…The Pro plan saves roughly ฿2,280 per month across those subscriptions. The Pro plan saves roughly ฿2,090 per month by comparison. Founding members who sign up during the launch period can lock in ฿199 per month for life.
Worth Trying If You Freelance in Thailand
Kitslancer fills a very specific gap that no Western productivity tool was ever going to address. If you are a Thai freelancer currently splitting your work across multiple apps and dreading tax season every quarter, this is worth a serious look. The free plan gives you everything you need to start, with no card required. Try it at kitslancer.com and see how much simpler your invoicing and tax tracking can actually be.
