Serhat Dereli

cash

Keuangan Bisnis

currency-coin

Keuangan Pribadi

Anggaran

chart-line

Pekerjaan

Mulai semester dengan benar

school

Sekolah

potted-plant

Kehidupan

UK-based builder of Notion systems for people who run things: a Gumroad store, a small UK business, or their own life admin. Built on UK rules — tax year, VAT, HMRC deadlines — and on a study of what actually sells. The formulas do the maths.

A UK budget planner that runs from payday to payday. It moves payday for weekends and bank holidays, spreads council tax over 10 months, puts money aside for yearly bills, tracks ISA allowances and checks your payslip at 2026/27 rates.

UK Budget Planner: payday to payday

Every HMRC and Companies House deadline for UK sole traders and small limited companies in 2026/27, with a live days-left countdown. Put in your year end and your accounts, Corporation Tax, CT600, confirmation statement and VAT dates work themselves out.

UK Small Business Deadline Calendar 2026/27

Log every letter, complaint and claim. Pick the type and the reply-by date, days left and next step work themselves out: refunds, ombudsmen, councils, parking tickets, data requests, tenancy deposits and tribunals. UK time limits, checked against the law.

Reply-By Log — UK complaints and deadlines

Areas, projects, tasks and notes, plus the layer other second brains skip: matters, a correspondence log, and reply-by dates that work themselves out. For the letters, deadlines and complaints that go in a drawer.

Second Brain — Life Admin Edition

Run a digital-product store from one Notion page: every product on a five-rung pricing ladder, a 14-step launch checklist, promo codes, affiliates, reviews, and monthly numbers with the Gumroad fee maths already worked out. Built after studying all 18 Discover categories.

Gumroad Seller OS

Work out what you actually keep from a Gumroad sale. 10% + $0.50 on your own links, 30% when Discover sends the buyer, affiliate commission on top — this table does all three and gives you the effective rate. Six worked examples included.

Gumroad Fee Calculator

Track UK invoices and see the statutory late-payment interest and fixed recovery fee you can claim on each overdue business invoice. Due dates, VAT, days overdue and payment status worked out for you.

UK Invoice Tracker with late-payment interest

Every bill and subscription in one place: what it costs a month and a year, when it renews, and the last day you can cancel without paying again. Renewals calendar, keep-or-cancel board and a where-the-money-goes chart. UK cancellation rights included.

Bills & Subscriptions Tracker — cancel in time

Know when you must register for UK VAT. Type each month's taxable sales and see your rolling 12-month total against the £90,000 threshold, with the date you would have to register by and the date VAT would start.

UK VAT Threshold Watch — rolling 12-month tracker

The back office for a UK sole trader or small limited company: clients, leads, projects, invoices with VAT and tax-year formulas, expenses, and the HMRC calendar with a live countdown. Built on UK rules, not adapted from a US template.

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