Edition, periods and filing obligation
The eleventh edition published 30 January 2026 explains GSTF 5/F 8 preparation, payment/refunds and penalties. File electronically through my Tax within one month after each period, including a nil return with no transactions. Quarterly is standard: financial year-ends Jan/Apr/Jul/Oct give Nov–Jan, Feb–Apr, May–Jul, Aug–Oct; Feb/May/Aug/Nov give Dec–Feb, Mar–May, Jun–Aug, Sep–Nov; Mar/Jun/Sep/Dec give Jan–Mar, Apr–Jun, Jul–Sep, Oct–Dec. Regular refund recipients may apply for monthly periods. Apply through my Tax email with reason/proposed frequency for changes; special non-month-end periods require reasons, all continuous dates and request at least 30 days before the first period, subject to approval.
Roles, due dates and extension exceptions
A Preparer drafts; an Approver reviews/submits, and both should communicate pending action. July 2023 monthly return was due 31 August; July–September quarterly 31 October. Generally no extension; exceptions require pre-deadline approval. First registration return can receive up to one month with no evidence; computer breakdown (IT report), new software/system (invoice), key accountant medical/hospital leave over one week (certificate), restructuring (notice/media), and seamless-filing API software errors (no evidence specified) can receive up to two weeks. First-return requests can use the helpline; other reasons email with evidence. Maternity leave, overseas staff/director, resignation without handover, year-end closing, inexperienced new staff, no computer and insufficient staff are not accepted reasons.
Correcting errors: F 7 or a next-return concession
Use F 7 to replace incorrect F 5/F 7/F 8, entering correct values for every box. Box 13-only revenue errors need no past correction, but correct later reporting. Next F 5 correction requires both: net output-minus-input tax error across all affected periods at most S$3,000; and total non-tax value errors for each period at most 5% of reported Box 4 supplies (taxable purchases if no supplies). Example omitted 10,000 standard supply/800 GST,2,000 zero supply and 1,000 purchase/80 GST gives net 720 but non-tax 13,000÷20,000=65%; F 7 is required. Preparer/Approver can request via GST > File GST Return / Edit Past Return.
Yearly consolidation and source box-label inconsistency
Errors can be consolidated annually (financial/calendar/tax year) into the last period’s F 7, adding the year’s errors to that period’s original figures and explaining them. Sample original 5,000 output plus 4,000 annual omission yields 9,000. The PDF calls this “output tax (Box 7)” in that example, but its own form definitions consistently put output in Box 6 and input in Box 7; use the correct output-tax field rather than copying the inconsistent label. Correct promptly within five years of period-end; after one year penalties may apply. The example December 2023 error deadline is 31 December 2028. The guide says F 7 is not needed after the correction window has passed; this is not permission to deliberately delay disclosure.
Final return and assets at deregistration
F 8 accounts deemed supplies of taxable inventory/capital assets at last registration day, using that day’s GST-exclusive open-market value and prevailing rate. No asset output applies if previously input-claimed assets total at most S$10,000; whole going-concern transfer to another registered business; or continued business by a deemed taxable person following liquidation/receivership/death/incapacity. Include prior input-claimed assets, deemed claims under MES/approved 3 PL and assets received in a registered going-concern transfer; exclude non-registered purchases. Keep the business bank account open until refund, which goes to business, not directors/partners.
Box 1: standard-rated supplies and reductions
Report value excluding GST, tracked separately from tax. Include sales to customers/government/tourists, discounted sales, part-payment deposits, consignment/vending/gaming net takings, construction/retentions, commercial rent/hotel rooms, vehicle value excluding COE/PARF/ARF/road tax/registration, hire purchase, full values under discounted-sales/gross-margin schemes, intercompany sales outside GSTgroup/division, machinery rent and professional/management/maintenance/commission fees. Include taxable remote services/LVG, staff sales, business-asset disposals, deemed gifts over S$200 where input claimed, non-business use/free premises with prior input, full trade-in value, section 33(2) agent sales, reimbursements as own supply, customer-accounting purchases and reverse-charge imports. Deduct credit/debit reductions such as returns/discounts.
Boxes 1/2 exclusions and zero-rated supplies
Exclude in-bond/zero GST or licensed-warehouse overseas goods, uncleared FTZ goods, out-of-scope third-country trade and true agent disbursements from Box 1. Wrongful pre-registration GST collections are not ordinary Box 1 sales: notify/pay the Comptroller under the linked disclosure guidance. Box 2 includes exports including investment precious metals and statutory international services; deduct returns/discounts, and exclude those warehouse/FTZ goods and agent disbursements. Overseas connection alone is not proof of zero-rating.
Box 3 and all nine exempt-finance categories
Exempt supplies include residential sale/rent, domestic investment precious metals and Fourth Schedule financial services, including supplies treated as incidental/taxable for input allocation under regulations 28/29/33. Finance categories are: bank deposits (interest); foreign exchange (fees and realised net gains/losses, absolute loss); credit/loans (gross interest, bond purchaser’s upfront discount/coupons, factoring discount/interest); share issues/sales (gross proceeds); bond issues/sales (gross proceeds); options/warrants/collars/floors/caps (issue premiums or traded gross proceeds); non-physical swaps; non-physical forwards; non-physical futures (each absolute net realised gain/loss). Treat the nine categories separately and sum each absolute category value. Forex concession permits total realised/unrealised if not separately tracked. Example−150+100−200=−250 forex plus 400 deposit interest gives 650, not 150.
Box 4 and Box 5 inclusions
Box 4 auto-sums 1+2+3. Box 5 taxable purchases are tracked independently, never reverse-calculated from input GST. Include registered supplier standard/zero-rated purchases, post-discount value, full gross-margin-scheme price including unknown GST, permits’ import values (including MES/3 PL/refiner, warehouse, import relief and 33(2)/33 A/33 B agency), eligible pre-registration purchases in first return, later supplier repayments after 19(12) reversal, and reverse-charge services/LVG. Deduct supplier-credit/purchase-return discounts and consideration still unpaid 12 months after due date if input previously claimed and repaid.
Box 5/7 exclusions and medical exceptions
Exclude wages, owner funding, private use, family benefits, restricted motor-car purchase/running, sports/recreation club fees, relevant renewed COE/rental-car expenses, gambling, exempt property/finance/precious metals, exempt metal imports, unregistered suppliers, in-bond/uncleared FTZ goods and no-supply money gifts/dividends/group purchases/fines. Motor-car definition exceptions matter. Staff medical expenses are generally blocked except obligatory work-injury/collective-agreement treatment, or from 1 October 2021 work-risk-related treatment required by written Singapore law or COVID treatment under government/public-authority written advisory. Examples include mandatory work medical exams/ship clinic and qualifying business/high-risk COVID tests. Medical/accident insurance exception requires work-injury law or collective agreement. These restrictions also apply to Box 7 input; exclude non-business input and unknown gross-margin GST.
Box 6: output adjustments and regimes
Include tax on Box 1 transactions except your supplied customer-accounting goods where the customer accounts output. Include recovered previously relieved bad debt, lost entitlement to previously allowed tourist refund (independent retailer/central agency only), reverse-charge services/LVG, OVR remote services and LVG. Deduct output reductions from sales-credit/debit returns/discounts. Customer-accounting purchases and reverse charges can therefore affect output even without an ordinary sale.
Box 7: input, refunds and unpaid suppliers
Include claimable purchase GST, qualifying e TRS refunds paid that period (IR/CRA, not affiliated shops), bad-debt relief, re-payment to supplier after 19(12) reversal, erroneous import GST, eligible reverse-charge input and reverse-charge refund when overseas supplier unpaid 12 months. Deduct credit/debit tax reductions and unpaid consideration input repayment. Track independently of Box 5; if small input claims voluntarily omitted, the associated purchase may also be omitted from Box 5. Claim eligibility still matters, and zero-rated purchases have no input.
Boxes 8–13: settlement and declarations
Box 8 auto-computes 6−7. Less than S$5 payable/refundable is neither collected/refunded nor carried forward; check Account Summary for actual balance after F 7. Box 9 is permit-valued imports under approved MES/3 PL/other schemes, disabled otherwise. Box 10 declares IR/CRA tourist refunds already claimed in 7; affiliated shops do not declare. Box 11 declares bad-debt/reverse-charge refunds with retained self-review/qualifying evidence;12 declares pre-registration input only in first return, retaining checklist/calculator. Box 13 takes operating revenue from P&L whether audited or not, excluding fixed-asset disposal, grants and receipts for others.
Boxes 14–21: specialised disclosures
Box 14 reverse-charge imports applies to businesses without full input entitlement (such as exempt businesses, charities and dividend-only investment holders), reporting services/LVG value also in 1. Box 15 is marketplace operators’ OVR third-party remote-services value also in 1. Box 16 is deemed-supplier redeliverers/marketplaces’ imported LVG, and 17 other LVG suppliers’ value, each also in 1. These are additional disclosures, not substitutes for Box 1. Boxes 18–21 exist only for approved IGDS businesses and follow the separate IGDS guide.
Payment dates and modes
Pay by filing deadline unless extension approved. Existing GIRO deducts 15 th of the month after filing, next working day if needed; acknowledgement/Payment Plan shows dates, with no prior notice. Source examples July 2023 monthly 31 August or GIRO 15 September; July–September 31 October or 15 November. F 7 additional tax is immediately due because the original F 5/F 8 payment date already passed. Paper GIRO applications may exceed three weeks including bank processing. Other listed modes are Pay Now QR, internet bill/fund transfer, DBSPay Lah!, phone banking, ATM, AXS, SAM and post-office NETS; overseas companies without local accounts can use telegraphic transfer. Consult current payment guidance for availability.
Refund timing and withheld credits
From receipt, monthly refunds are within one month and quarterly within three: source examples 29 August 2023→29 September,29 October 2023→29 January 2024. Outstanding returns/taxes/penalties or missing audit information can withhold refund. In those cases, interest applies if not refunded within three months after outstanding returns filed, information supplied or taxes/penalties deducted; other nonautomatic credits may carry no interest. MOF sets/refines the late-refund rate annually; this source gives no numerical current rate. Under S$5 is not refunded/carried.
Late filing and payment penalties
Late F 5/F 8 can trigger estimated tax plus 5% late-payment penalty, revised to actual tax after filing. Filing penalty S$200 immediately and each completed month, cap S$10,000 per return; source 31 March 2023 return due 30 April filed 5 June gives 400. Non-filing can lead to court summons/arrest warrant. Late payment attracts 5%, then if unpaid 60 days after imposition,2% each month capped at 50% extra tax. Source S$10,000 due January 2024 paid 15 June:500+800 (four months)=1,300. Contact GSTDivision via IRAS Contact Us.
Source corrections and revision history
The source headings sometimes number form boxes 5.7 onward while body paragraphs use 6.x; use box labels rather than confusing section numbering. Its 4.2.16/17 and trailing refund bullets are genuinely blank in the rendered PDF, not missing extraction content. Earlier updates covere TRS 2015; periods 2016; filing penalties/customer accounting 2018; reverse charge OVR 2019; electronic filing/medical/payment 2021; motor-car 2022; remote services/LVG/disclosure boxes September 2022;8%2023 and 9% plus S$3,000 correction threshold 2024. Title/publication says 2026 but the displayed amendment log ends 2024; no unsupported 2026 change is invented.
Official source
This article independently explains the substantive contents of the official PDF, including the relevant conditions, procedures and annexes. The linked document remains the authoritative source for its original wording, and later changes should be checked separately.
Read the official PDF ↗