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Substantive filing obligation verification
We audit whether the taxpayer was legally obliged to file in the investigated tax year or fell under exempt/non-filer thresholds, nullifying assessments tainted by false factual motives.
Official Determination · Total Failure to File Returns
DIAN Default Assessment (Aforo):
legal defense, reconsideration appeal, and asset protection with the reference tax-law firm in Colombia.
When a taxpayer omits filing returns following DIAN's statutory summons under Article 715 and penalty proceedings under Article 643, the tax authority may officially determine liability within five years via a liquidación de aforo (Art. 717 Tax Statute). The assessment places a statutory lien on assets, but is fully challengeable on administrative appeal.
5.0 / 5 · 29 reviewsEx-DIANArts. 715 to 719 Tax StatuteReconsideration Appeal
Also via WhatsApp: +57 319 272 9164. Bogotá · Calle 99 7A-51, Of. 206. In-person and remote service.
Statutory Scheme of Articles 715 to 719
Official default determination: mandatory prior procedure, five-year expiration, and asset liens.
An official default assessment (liquidación de aforo) is the administrative act through which DIAN unilaterally determines the substantive tax liability of a taxpayer, withholding agent, or entity that has completely omitted filing tax returns. Governed by Articles 715 to 719 of the Colombian Tax Statute, this authority does not operate automatically: statutory law imposes mandatory exhaustion of prior procedural steps under Articles 715 and 716. First, DIAN must issue a formal prior summons to file (emplazamiento previo por no declarar, Article 715), having substantiated the underlying obligation, granting an unextendable one (1) month deadline to file. Taxpayers filing within this month must compute late-filing penalties under Article 642 E.T. If the month expires without a filed return, DIAN applies the failure-to-file penalty under Article 643 E.T. Only upon strictly exhausting these preliminary proceedings does Article 717 empower DIAN to determine tax liability through a default assessment within five (5) years following the original statutory filing deadline.
The default assessment must strictly satisfy the content requirements of Article 719, cross-referencing Article 712: identification of the taxpayer, tax period, quantification bases, tax and penalty amounts, official signature, and a summary explanation of the grounds for the assessment. Pursuant to Articles 719-1 and 719-2, once the assessment is notified, DIAN orders its inscription in public property registries, creating a statutory real encumbrance (garantía real) over the taxpayer's assets enforceable even against third-party transferees. This lien may only be lifted upon full debt extinction, revocation or annulment of the act, posting a bank guarantee or insurance bond, or offering sufficient real property for attachment. Against the liquidación de aforo, taxpayers may file a reconsideration appeal (recurso de reconsideración, Article 720 E.T.) within two (2) months of notification before DIAN; upon exhausting the administrative channel, judicial annulment proceedings become available. Under Article 640 E.T., statutory penalty reductions require that DIAN has not yet issued a prior summons to file, making pre-summons intervention paramount.
Procedural Stages of Default Assessment
- Art. 715 E.T.: mandatory prior summons to file (strict 1-month term).
- Art. 716 E.T.: imposition of failure-to-file penalty (Art. 643) post-deadline.
- Art. 717 E.T.: issuance of default assessment within 5 statutory years.
- Arts. 719-1 & 719-2: registration of statutory real encumbrance on assets.
- Art. 720 E.T.: reconsideration appeal within 2 months of notification.
Technical and Procedural Strategy
Procedural validity review, accounting cost reconstruction, and appeals.
We contest DIAN default assessments by attacking procedural defects in prior summonses, dismantling presumptive income estimates, and filing rigorous reconsideration appeals.
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Summons validity and 5-year limitation audit
We verify whether DIAN fulfilled mandatory procedural steps under Articles 715 and 716 and served the default assessment within the strict 5-year statutory deadline of Article 717.
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Accounting reconstruction of costs, deductions & credits
When a default assessment relies on exógena cross-checks or revenue estimates, Jeysson Pulido and LIGAL Auditores reconstruct books to substantiate actual costs, purchases, and withholdings.
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Reconsideration appeal and statutory lien cancellation
We draft and lodge the Article 720 reconsideration appeal on time and process the release or substitution of registered liens over real property and corporate assets (Art. 719-2).
Who Handles Your File
Tax litigation attorneys and certified accountants defending official default assessments.
A default assessment directly endangers corporate and personal assets. It requires elite tax litigation to assert procedural nullities combined with forensic accounting to prove actual net income.
Director · Tax Attorney, Ex-DIAN
Juan Santiago Rodríguez Prieto
Formulates administrative nullity grounds, challenges the validity of prior summonses under Art. 715, and leads reconsideration appeals and judicial litigation before administrative courts.
Lead Accountant · Tax Quantification
Jeysson Pulido
Reconstructs unfiled income and VAT returns, audits third-party exógena data used by DIAN, and disproves presumptive revenue through comprehensive bank reconciliation.
Certified Public Accountants · Law 43 of 1990
LIGAL Auditores
Reconstructs evidentiary files for deductible business expenses, inventory costs, and tax withholding certificates, assembling full legal proof to counter arbitrary assessments.
Professional Standards
What We Do Not Do in default assessment defense.
We do not accept assessments that ignore deductions and withholdings
If the default assessment is built on estimated gross income (for example, bank deposits or third-party data) without recognizing costs or withholdings, we demand determination of actual net taxable income.
We do not allow the 2-month appeal deadline to expire
If a default assessment is not appealed within the two-month term of Article 720 E.T., it achieves administrative finality, triggering payment orders and asset seizures.
We do not confuse default assessments with revision assessments
Revision assessments (liquidación de revisión, arts. 702 et seq. E.T.) modify filed returns; default assessments arise from complete omission. Legal defenses and limitation periods differ fundamentally.
Specialized Tax Defense
Default assessment (Aforo): legality oversight and forensic asset protection.
The default assessment mechanism under Articles 715 to 719 of the Tax Statute is DIAN's most aggressive tool of tax determination. Lacking a taxpayer-filed return, the tax agency constructs tax liability from indirect evidence, bank movements, or third-party reporting, meaning the official base must be contrasted against the taxpayer's accounting proof. Nonetheless, statutory law demands strict observance of prior summonses (Art. 715), compliance with the 5-year expiration term (Art. 717), and full evidentiary due process. Juan Santiago Rodríguez Prieto, former DIAN officer, and LIGAL's integrated team mount a structured defense to dismantle presumptive estimates and safeguard client assets. The firm handles real audit, coercive collection, and tax litigation cases: in a verified Google review, client Julian Rodriguez shares that, thanks to representation before DIAN, "we achieved the closure of a tax lawsuit pending against my company".
Please note: notice of a default assessment orders registration of the debt in public registries (Art. 719-1 E.T.), encumbering your assets with a statutory lien. Filing a timely reconsideration appeal is the way to prevent it from becoming final.
Director
Juan Santiago Rodríguez Prieto
Tax Attorney · Ex-DIAN
- Calle 99 7A-51, Oficina 206, Bogotá
- +57 319 272 9164
- Free diagnostic within 48 business hours
- 5.0 / 5 on Google · 29 reviews
Tax Determination
Complementary resources in DIAN tax controversies.
Defense Roadmap
Default assessment diagnostic. Free. Response within 48 business hours.
We evaluate your summons or default assessment notice, audit 5-year expiration terms, and formulate your defense. Receive an assessment within 48 business hours. Fill out the form or visit Diagnostic.
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TodaySubmit summons or default assessment act
Attach the DIAN assessment notice, certificate of service, and official calculation sheets.
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48 business hoursAudit statutory expiration and reconstruct costs
We review the 5-year limitation of Art. 717, audit Arts. 715/716 procedures, and quantify deductions.
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ImmediateFile reconsideration appeal & cancel liens
We lodge the Article 720 reconsideration appeal with certified proof and petition lien cancellations.
Frequently Asked Questions
DIAN Default Assessments (Liquidación de Aforo), Clearly Explained
It is the formal administrative act whereby DIAN unilaterally determines the tax liability and applicable penalties for a taxpayer that has completely failed to file statutory tax returns, having previously exhausted mandatory preliminary summons and sanction procedures.
Prior to issuing a default assessment, DIAN must notify a formal prior summons to file (emplazamiento previo por no declarar, Article 715), granting an unextendable one (1) month window to file. If the return remains unfiled, DIAN must impose the failure-to-file penalty under Article 643 (Article 716). Only thereafter can a liquidación de aforo lawfully issue.
Under Article 717 of the Tax Statute, DIAN has a strict five (5) year term, counted from the expiration date of the legal deadline to file, to determine tax liability through a default assessment. Failure to serve notice within this window causes statutory expiration of DIAN's power to assess.
An official revision assessment (liquidación oficial de revisión, arts. 702 et seq. E.T.) modifies or disallows items on a return previously filed by the taxpayer. A default assessment (liquidación de aforo, Articles 715 to 719) is issued when no return was ever filed, determining liability from the ground up.
Upon notification, DIAN orders the inscription of the default assessment in public property registries. Once registered, the taxpayer's assets become encumbered with a statutory lien (garantía real), enforceable even against third-party transferees. The lien can only be lifted upon debt payment, act annulment, a bank bond, or specific real estate attachment.
Taxpayers may file a reconsideration appeal (recurso de reconsideración, Article 720 E.T.) within two (2) months following notification. Once this administrative appeal is exhausted, the taxpayer may challenge the act in judicial court via a nullity and restoration of rights lawsuit.
When the penalty is calculated by the taxpayer, Article 640 conditions reductions to 50% or 75% on DIAN not having issued a statement of charges, special requirement, or prior summons to declare, as applicable. Therefore, filing the tax return before the summons is served is decisive.
Ligal is the reference tax-law firm in Colombia, uniting the ex-DIAN procedural mastery of Juan Santiago Rodríguez Prieto with the certified forensic accounting of Jeysson Pulido and LIGAL Auditores (Law 43 of 1990). We challenge procedural nullities, reconstruct actual costs and withholdings, and safeguard client assets with verified integrity, reflected in our Google 5.0 / 5 rating across 29 reviews: https://share.google/VVzMvULrOj8Mj52Au. The firm handles real audit, coercive collection, and tax litigation cases: in a verified Google review, client Julian Rodriguez shares that, thanks to representation before DIAN, "we achieved the closure of a tax lawsuit pending against my company".
Confidential Diagnostic
Challenge your DIAN default assessment. Response within 48 hours.
Free. Attach your assessment act or prior summons. We review 5-year expiration terms, procedural nullities, and prepare your reconsideration appeal.