Organise your Singapore paperwork — on your iPhone, not a server

Singapore has one of the more structured paperwork landscapes in the world. IRAS sets explicit record-keeping obligations tied to Year of Assessment. GST-registered businesses must distinguish between tax invoices and till receipts — two documents that look similar but carry different legal weight. CPF statements arrive annually and feed directly into tax relief claims. HDB documentation accumulates over decades of ownership. And all of this exists alongside the ordinary paperwork of modern life: insurance policies, renovation contracts, utility bills, vehicle records.

More structure than most countries means more consequences for disorganisation. A misfiled GST tax invoice costs you an input tax claim. A missing warranty receipt means you pay for a repair the manufacturer should have covered. A renovation contract you can't find becomes a dispute you can't easily win.

filedup is a document organiser for iPhone that handles all of this on-device. Scan a document, let the AI extract the fields, file it to a folder. Everything stays on your phone. Nothing goes to a server. Nothing is uploaded, indexed, or processed by a third party.

This page is for general information only and does not constitute tax, legal, or financial advice. For obligations specific to your situation, refer to IRAS guidance or consult a qualified professional.

IRAS record-keeping obligations

The Inland Revenue Authority of Singapore requires individuals and businesses to retain records that support their income tax returns for a minimum of five years from the relevant Year of Assessment. This is not a guideline — it is a statutory obligation under the Income Tax Act.

For GST-registered businesses, the obligation extends to GST records: tax invoices issued and received, import and export documents, and the underlying accounting records that support GST returns. The same five-year minimum applies, and IRAS may request these records during an audit.

What counts as a valid electronic record? IRAS accepts electronic records provided they are:

• Complete — the electronic version must be a faithful reproduction of the original, including all fields. A cropped or partial scan is not sufficient.
• Accurate — the contents must match the original document. An image that is too dark, blurred, or faded to read clearly is not an adequate record.
• Retrievable — you must be able to produce the record promptly on request. A document buried in an unsorted camera roll that might have been deleted during a phone upgrade does not meet this standard.

In practical terms: a clear, organised scan on your phone counts. A photo in your camera roll, taken on a phone you no longer own, probably does not. The difference is organisation and intentionality — which is exactly what filedup provides.

The five-year clock starts from the Year of Assessment, not the calendar year in which the document was created. YA 2026 covers income earned in the 2025 calendar year. Records supporting your YA 2026 return must be kept until at least YA 2031 is finalised. When the retention period is unclear, keeping longer is always the safe choice.

GST tax invoice vs receipt — a critical distinction

This distinction matters most for GST-registered businesses claiming input tax, but it's useful for anyone keeping business expense records in Singapore.

A till receipt or hawker receipt is proof that a transaction occurred. It shows what you paid. It is not a tax invoice. It cannot be used to support an input GST claim — even if the vendor is GST-registered — unless it happens to include all the required fields of a tax invoice.

A valid GST tax invoice must contain seven specific elements:

• The words "Tax Invoice" prominently displayed
• The supplier's GST registration number
• A sequential invoice number
• The date of issue
• The name and address of the supplier
• A description of the goods or services supplied, with quantity and value
• The GST amount charged and the total amount payable including GST

GST-registered suppliers are required to issue a tax invoice for sales above S$1,000. For smaller amounts, a simplified tax invoice (which requires fewer fields) is permitted. If you're claiming input GST on a business expense, ask for the tax invoice at the point of sale — the vendor is required to provide one if they're GST-registered and you request it.

For a practical guide to receipt scanning specific to Singapore, including how to handle hawker receipts vs tax invoices in your filing system, see the best receipt scanner app for Singapore in 2026.

CPF, SRS, and investment documents

CPF contribution statements arrive annually from the CPF Board. They show your Ordinary Account, Special Account, and MediSave contributions for the year — including both your contributions and your employer's. These statements are important for:

• CPF Cash Top-Up Relief — contributions to your own or a family member's Special or Retirement Account are partially deductible. The CPF statement is the supporting document.
• SRS contributions — contributions to a Supplementary Retirement Scheme account are deductible up to the annual cap. Your SRS operator issues an annual statement confirming contributions.
• Retirement planning — your CPF balance history is not something you can easily reconstruct if your online CPF access is interrupted or your records are lost. Annual statements are your paper trail.

Other documents in this category worth scanning and organising:

• Donation receipts from approved Institutions of a Public Character (IPCs) — these generate a 2.5x tax deduction, and the receipt is the sole proof of eligibility. Scan them immediately; IPC records can be difficult to retrieve retrospectively.
• Course fee receipts for subsidised or professional development courses claimed under the Course Fees Relief.
• Foreign domestic worker levy statements, relevant for the Working Mother's Child Relief and the Foreign Domestic Worker Levy Relief.
• NS pay statements and booking-out receipts, relevant for NS55 recognition credits and other credits available to NSmen.

HDB and housing paperwork

A property in Singapore generates a significant volume of documentation across its lifetime — much of it time-sensitive and difficult to replace.

Purchase documents. The Option to Purchase (OTP), Sale and Purchase (S&P) agreement, and completion documents form the foundation of your ownership record. These establish the date of acquisition and the purchase price, both of which affect future stamp duty calculations and any capital gains treatment.

Renovation permits and contracts. HDB renovation permits specify what work was approved. If you sell or return a flat, the renovation works must match the approved permit. Renovation contracts and progress payment invoices document what you paid — relevant for the cost basis of improvements and for any dispute with the contractor.

Housing loan statements. Annual statements from your bank or HDB showing loan balance, interest paid, and CPF used. Needed for CPF withdrawal records and for refinancing applications.

Conservancy and service charge records. Town council bills and payment receipts. Relevant for arrears checks at sale and useful as proof of residence for various government applications.

For a complete guide to the paperwork involved in buying a first home, see the paperwork of buying your first home.

PDPA and why on-device processing matters in Singapore

Singapore's Personal Data Protection Act (PDPA) governs how organisations collect, use, and disclose personal data. It applies to organisations, not individuals — but if you're running a sole proprietorship, a freelance business, or a small company, you are an organisation for PDPA purposes.

A document scanning app that uploads your receipts and invoices to a cloud server for processing is, in PDPA terms, a third-party data processor receiving personal data. The data on a receipt — your name, transaction amount, merchant name, date, location — is personal data. If the processing server is based in the United States or another jurisdiction, the transfer of that data overseas triggers PDPA's data transfer requirements.

For individuals scanning personal documents, the PDPA risk is limited (the Act protects your data from others, but doesn't restrict your own choices about your own data). For businesses scanning business records — supplier invoices, employee expense claims, client documents — the picture is more complex.

filedup processes everything on-device. There is no upload. No API call to an external server. No third party that receives your data. The on-device processing model sidesteps the data transfer question entirely — which is a cleaner outcome both practically and under PDPA.

A Year of Assessment folder system for Singapore

The most effective system for Singapore individuals and sole traders is one folder per Year of Assessment, with sub-folders for each document type. Here is a starting structure:

YA 2026 (covering income earned January–December 2025)

• Business Expenses — tax invoices and receipts for deductible business costs. Only tax invoices for GST-registered claims; annotate with the business purpose.
• CPF & SRS — annual CPF statement, SRS contribution statement, any top-up receipts.
• Donations — IPC donation receipts. Note the 2.5x deduction multiplier applies only to approved IPCs — check the Commissioner of Charities register if unsure.
• Employment Income — IR8A form from your employer, any freelance or commission income statements.

Repeat this structure for each year. After you file your return and the assessment is finalised, mark the folder as complete. Leave it in filedup for the full five-year retention period; don't move or reorganise documents between Year of Assessment folders.

The YA clock to remember: YA 2026 covers income earned in the 2025 calendar year. The five-year retention requirement for YA 2026 records runs until the end of 2031 — or five years after the YA, whichever interpretation IRAS applies to your situation. When in doubt, keep until 2031 and then review.

Alongside the YA structure, maintain standing folders for long-term records that don't belong to a single year:

• HDB + Housing — purchase documents, renovation permits, loan statements.
• CPF History — multi-year CPF statements for long-term balance tracking.
• Insurance — policy schedules, coverage confirmations, claims history.
• Vehicle — COE documentation, service records, insurance.

Getting started

Download filedup from the App Store — it's free. Create your first folder: "YA 2026" is a good starting point for most Singapore users, or "Work Claims" if you have employer expense claims to file. Scan the most recent IRAS-relevant document you have on hand — a GST tax invoice, a donation receipt, a CPF statement. The AI will extract the key fields; review them and file. That's the whole process.

Once you've scanned a few documents, the time savings over searching an unsorted camera roll become apparent quickly. The five-year retention rule stops being a source of anxiety and becomes a folder you know exactly where to find.