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Income tax incurred and deferred: | 12 Months Ended
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Dec. 31, 2018
Income taxes [Abstract] |
Disclosure of income tax [text block] | Note 14 - Income tax incurred and deferred: The Company does not consolidate its results for tax purposes.
| a. | Income Tax
Mexico: In 2016, 2017 and 2018, the Company determined tax profits in its subsidiaries in the amounts of Ps 5,051,189, Ps6,358,687 and Ps5,984,043 7, respectively. In 2016, 2017 and 2018, the tax profits were partially offset with the amortization of tax losses in the amounts of Ps86,083 , Ps93,975 and Ps41,977, respectively. The subsidiaries that at December 31, 2017 and 2018, have not assessed income tax due to the tax loss carryforwards are Cozumel, Minatitlan and Tapachula. Taxable income differs from the book income due to temporary and permanent differences arising from the different bases for the recognition of the effects of inflation for tax purposes and from the permanent effects of items affecting only the book or tax results. The ITL establishes for 2014 and subsequent years an income tax rate of 30%. The Company has performed the evaluation of the Preferential Tax Regimes and has determined that this year it is not applicable because it does carry out a business activity, in the case of the investment in the airport of Puerto Rico, and that passive income does not represent more than 20% of its total income. Aerostar: The Company determined tax loss in Puerto Rico for Ps437,197 and Ps343,534 in 2017 and 2018, respectively, derived from the agreement with the Department of the Treasury of Puerto Rico in which its operations are subject to income taxes of Puerto Rico of 10% under the provisions of Section 12 (a) of the Public Private Partnership Law (Law) enacted in June 2009. Derived from the analysis carried out by the Administration, it is considered that there are no impacts due to changes in the legislation of the United States of America made since the 2018 fiscal year. Airplan: The Company determined taxable income in accordance with the tax law of Colombia for the period from October 19, to December 31, 2017, and for the year ended December 31, 2018 of Ps48,877 and Ps94,843, and a presumptive income on liquid equity, which results from applying the 4.0% and 3.5% rate on the fiscal liquid equity of the previous year, of Ps23,462 and Ps24,719 respectively. The Company is subject in 2018 to income taxes in Colombia of 33% (34% in 2017) plus a 6% surcharge on liquid income less COP800,000. The Company determined an income tax of Ps16,618 in 2017 and Ps31,298 in 2018, respectively, and an additional surcharge tax of Ps2,933 and Ps3,600 for the aforementioned periods. Law 1739 of December 23, 2014 in force, establishes the determination and payment of a surcharge on income tax for equity - CREE, which is the responsibility of the taxpayers of this tax and applies to a taxable base higher than the COP800,000, which is equivalent to 6%. That over rate was repealed to from the year 2018. The tax reform establishes that the tax rate applicable for the year 2018 and subsequent years is 33% of the taxable income. The IT provision at December 31, 2017 and 2018 is as follows:
|  | December 31, |
Deferred tax asset: |  | 2017 |  |  | 2018 |
Deferred tax recoverable within the following 12 months |  | Ps | 73,710 |  |  | Ps | 53,121 |
Deferred tax recoverable after 12 months |  |  | 253,310 |  |  |  | 250,491 |
Recoverable asset tax |  |  |  |  |  |  |  |
|  |  | 327,020 |  |  |  | 303,612 |
Deferred tax liability : |  |  |  |  |  |  |  |
Deferred tax payable after 12 months |  |  | (3,360,950 | ) |  |  | (3,385,280 | )
Deferred tax liability - Net |  | Ps | (3,033,930 | ) |  | Ps | (3,081,668 | )
The IT provision at December 31, 2016, 2017 and 2018 is as follows: Mexico:
|  | 2016 |  |  | 2017 |  |  | 2018 |
Current IT |  | Ps | 1,502,976 |  |  | Ps | 1,908,646 |  |  | Ps | 1,766,083 |
Deferred IT |  |  | (101,792 | ) |  |  | (312,091 | ) |  |  | 13,116 |
IT provision |  | Ps | 1,401,184 |  |  | Ps | 1,596,555 |  |  | Ps | 1,779,199 |
Aerostar : |  |  |  |  |  |  |  |  |  |  |  |
IT deferred for the year ended December 31, 2018 and for the period from May 26 to December 31, 2017 |  | Ps |  |  |  | Ps | 28,678 |  |  | Ps | 33,879 |
Airplan : |  |  |  |  |  |  |  |  |  |  |  |
Current IT |  | Ps |  |  |  | Ps | 19,551 |  |  | Ps | (20,098 | )
Deferred IT |  |  |  |  |  |  | (9,337 | ) |  |  | 2,981 |
IT Provision Airplan for the year ended |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2018 and for the period |  |  |  |  |  |  |  |  |  |  |  |
October 19, to December 31, 2017 |  | Ps |  |  |  | Ps | 10,214 |  |  | Ps | (17,117 | )
Total IT provision |  | Ps | 1,401,184 |  |  | Ps | 1,635,447 |  |  | Ps | 1,795,961 |
The reconciliation between the statutory and effective income tax rates is shown below:
|  | 2016 |  |  | 2017 |  |  | 2018 |
Consolidated income before IT and joint venture equity method: |  | Ps | 4,887,130 |  |  | Ps | 8,498,889 |  |  | Ps | 6,916,699 |
Plus (less): |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income before taxes of Airplan and Aerostar |  |  |  |  |  |  | 16,011 |  |  |  | (297,179 | )
Net (loss) income before taxes of subsidiaries in Mexico not subject to IT |  |  | (56,415 | ) |  |  | (62,327 | ) |  |  | (89,685 | )
Income before provisions for income taxes |  |  | 4,830,715 |  |  |  | 8,452,573 |  |  |  | 6,529,835 |
Statutory IT rate |  |  | 30 | % |  |  | 30 | % |  |  | 30 | %
IT that would result from applying the IT rate to book profit before income taxes |  |  | 1,449,214 |  |  |  | 2,535,772 |  |  |  | 1,958,951 |
Non-deductible items and other permanent differences |  |  | 11,908 |  |  |  | 8,693 |  |  |  | 15,126 |
Gain on business combination |  |  |  |  |  |  | (2,108,760 | ) |  |  |  |
Goodwill impairment |  |  |  |  |  |  | 1,415,729 |  |  |  |  |
Annual adjustment for tax inflation |  |  | (10,974 | ) |  |  | (2,406 | ) |  |  | 12,101 |
Accounting disconnect inflation |  |  | (91,928 | ) |  |  | (249,336 | ) |  |  | (189,237 | )
Recognition of deferred income tax at the Huatulco Airport (1) |  |  | 44,020 |  |  |  |  |  |  |  |  |
Recognition for the year in Aerostar (2) |  |  |  |  |  |  | 28,678 |  |  |  | 33,879 |
Recognition for the year in Airplan (2) |  |  |  |  |  |  | 10,214 |  |  |  | (17,117 | )
Other non-taxable earnings |  |  | (1,056 | ) |  |  | (3,137 | ) |  |  | (17,742 | )
IT provision |  | Ps | 1,401,184 |  |  | Ps | 1,635,447 |  |  | Ps | 1,795,961 |
Effective IT rate |  |  | 29 | % |  |  | 19 | % |  |  | 28 | %
| (1) | Based on the tax projections at December 31, 2017, the Huatulco Airport is expected to pay income tax in the future. Accordingly, the Company decided to recognize deferred income tax. This recognition increased the effective rate by 3%.
| (2) | As of June 1, 2018, Aerostar consolidates into the Company and as of October 19, 2017, Airplan consolidates financially into the Company.
Following are the principal temporary differences with respect to deferred tax:
|  | Period ended |
|  | December 31, |
|  | 2017 |  |  | 2018 |
Deferred income tax asset: |  |  |  |  |  |  |  |
Deferred income tax asset: |  |  |  |  |  |  |  |
Temporary liabilities |  | Ps | 48,439 |  |  | Ps | 53,121 |
Fair value of long-term debt |  |  | 208,394 |  |  |  | 213,617 |
Allowance for doubtful accounts |  |  | 44,916 |  |  |  | 36,874 |
|  |  | 301,749 |  |  |  | 303,612 |
Deferred income tax payable: |  |  |  |  |  |  |  |
Fixed and intangible assets |  |  | (2,900,893 | ) |  |  | (3,139,757 | )
Temporary assets |  |  | (433,411 | ) |  |  | (244,502 | )
Amortization of expenses |  |  | (1,375 | ) |  |  | (1,021 | )
|  |  | (3,335,679 | ) |  |  | (3,385,280 | )
Deferred income tax liability - net |  | Ps | (3,033,930 | ) |  | Ps | (3,081,668 | )
At June 1, 2017, and October 19, 2017, Aerostar and Airplan consolidated into the Company, respectively, with an initial recognition for deferred tax liabilities of Ps808,894 and Ps861,483, respectively, due to the temporary difference between accounting and tax amortization rates.
| (*) | Includes Ps267,307 and Ps943,256 from Aerostar from the periods 2017 and 2018, and Ps357,563 and Ps909,706 from Airplan in 2017 and 2018.
The net movements of the deferred tax asset and liability for the year are as follows:
|  | Provision |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | for loan |  |  |  |  |  | Recoverable |  |  | Foreign |  |  |  |  |  |  |
|  | portfolio |  |  | Concessioned |  |  | asset |  |  | currency |  |  |  |  |  |  |
|  | impairment |  |  | assets |  |  | tax |  |  | translarion |  |  | Other |  |  | Total |
Balances at January 1, 2016 |  | Ps | (31,576) |  |  | Ps | 1,766,981 |  |  | Ps | (186,875) |  |  | Ps |  |  |  | Ps | (24,808) |  |  | Ps | 1,523,722 |
Recovery of asset tax |  |  |  |  |  |  |  |  |  |  | 34,090 |  |  |  |  |  |  |  |  |  |  |  | 34,090 |
Tax charged or credited in the statement of income |  |  | (2,354 | ) |  |  | (94,340 | ) |  |  |  |  |  |  |  |  |  |  | (5,098 | ) |  |  | (101,792 | )
|  |  | (2,354 | ) |  |  | (94,340 | ) |  |  | 34,090 |  |  |  |  |  |  |  | (5,098 | ) |  |  | (67,702 | )
Balances at December 31, 2016 |  |  | (33,930 | ) |  |  | 1,672,641 |  |  |  | (152,785 | ) |  |  |  |  |  |  | (29,906 | ) |  |  | 1,456,020 |
Recovery of asset tax |  |  |  |  |  |  |  |  |  |  | 152,785 |  |  |  |  |  |  |  |  |  |  |  | 152,785 |
Initial recognition of Aerostar |  |  |  |  |  |  | 203,512 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 203,512 |
Initial valuation in Aerostar investment |  |  |  |  |  |  | 605,382 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 605,382 |
Net assets acquired under the business combination of Airplan |  |  |  |  |  |  | 281,899 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 281,899 |
Effect of foreign currency translation Aerostar |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 35,117 |  |  |  |  |  |  |  | 35,117 |
Initial recognition of Airplan |  |  |  |  |  |  | 356,296 |  |  |  |  |  |  |  |  |  |  |  | 223,289 |  |  |  | 579,585 |
Effect of foreign currency translation Airplan |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,458 |  |  |  | 4,922 |  |  |  | 12,380 |
|  |  |  |  |  |  | 1,447,089 |  |  |  | 152,785 |  |  |  | 42,575 |  |  |  | 228,211 |  |  |  | 1,870,660 |
Tax charged or credited in the statement of income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Airplan |  |  |  |  |  |  | (6,191 | ) |  |  |  |  |  |  |  |  |  |  | (3,146 | ) |  |  | (9,337 | )
Aerostar |  |  |  |  |  |  | 28,678 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 28,678 |
Mexico |  |  | (10,986 | ) |  |  | (283,899 | ) |  |  | - |  |  |  |  |  |  |  | (17,206 | ) |  |  | (312,091 | )
|  |  | (10,986 | ) |  |  | (261,412 | ) |  |  | - |  |  |  |  |  |  |  | (20,352 | ) |  |  | (292,750 | )
Balances at December 31, 2017 |  | Ps | (44,916) |  |  | Ps | 2,858,318 |  |  | Ps | - |  |  | Ps | 42,575 |  |  | Ps | 177,953 |  |  | Ps | 3,033,930 |
Effect of foreign currency translation Airplan and Aerostar |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20,427 |  |  |  | (22,665 | ) |  |  | (2,238 | )
|  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20,427 |  |  |  | (22,665 | ) |  |  | (2,238 | )
Tax charged or credited in the statement of income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Airplan |  |  | (2,468 | ) |  |  | 178,236 |  |  |  |  |  |  |  | (1,433 | ) |  |  | (171,354 | ) |  |  | 2,981 |
Aerostar |  |  |  |  |  |  | 35,440 |  |  |  |  |  |  |  | (1,561 | ) |  |  |  |  |  |  | 33,879 |
Mexico |  |  | 10,510 |  |  |  | 7,755 |  |  |  | - |  |  |  |  |  |  |  | (5,149 | ) |  |  | 13,116 |
|  |  | 8,042 |  |  |  | 221,431 |  |  |  | - |  |  |  | (2,994 | ) |  |  | (176,503 | ) |  |  | 49,976 |
Balances at December 31, 2018 |  | Ps | (36,874) |  |  | Ps | 3,079,749 |  |  | Ps | - |  |  | Ps | 60,008 |  |  | Ps | (21,215) |  |  | Ps | 3,081,668 |
| b. | Return of Asset Tax (AT) in accordance with the Law on Flat Rate Business Tax (Flat Tax Law) in Mexico.
AT in excess of income tax effectively paid until December 31, 2007, (date on which AT was repealed) is subject to refund in accordance with the procedure established in the Flat Tax Law in the following ten periods up to 10% of the total AT paid and not yet recovered, without it exceeding the difference between the income tax paid in the period and the AT paid in the previous three years, whichever is lower, in accordance with the Flat Tax Law, when income tax incurred is higher than AT in any of those years, and it is subject to restatement through the application of “National Consumer Price Index” Mexican factors. The last year that the AT can be recovered is 2017. During fiscal years 2016, 2017 and 2018, the Company obtained the recovery of AT for Ps50,716, Ps211,675 and Ps89,365 respectively, with no recognition in the results of 2016 and recognition in the results of 2017 and 2018 as revenue Ps58,890 and Ps89,365, respectively. In 2017 and 2018, AT of Ps932 respectively, was applied in the results for the period under income taxes in favor of some subsidiaries in which the tax will not be recoverable not in accordance with the procedure established in the Flat Tax Law, which establishes that the tax is recoverable gradually every year up to a maximum of 10% of the total AT paid in the 10 years prior to 2008. Recoverable taxes At December 31, 2018 and 2017, the tax credits are as follows:
|  | December 31, |
|  | 2017 |  |  | 2018 |
Income tax |  | Ps | 74,885 |  |  | Ps | 345,730 |
Asset tax |  |  | 8,006 |  |  |  |  |
|  | Ps | 82,891 |  |  | Ps | 345,730 |
Aerostar Tax loss Carry forwards : Aerostar had cumulative tax loss carry forwards whose right to be amortized against future taxable income expires as shown below:
|  |  |  |  | Year of
Year of loss |  | Amount |  |  | expiration
2012 |  | USD | 7,085 |  |  | Ps | 139,220 |  |  | 2022
2013 |  |  | 37,256 |  |  |  | 732,080 |  |  | 2023
2014 |  |  | 25,545 |  |  |  | 501,959 |  |  | 2024
2015 |  |  | 28,520 |  |  |  | 560,418 |  |  | 2025
2016 |  |  | 27,745 |  |  |  | 545,189 |  |  | 2026
2017 |  |  | 22,248 |  |  |  | 437,173 |  |  | 2027
2018 |  |  | 17,482 |  |  |  | 343,521 |  |  | 2028
Total |  | USD | 165,881 |  |  | Ps | 3,259,560 |  |  |
Temporal differences not recognized Temporary difference related to investments in subsidiaries for which no liabilities have been recognized for deferred income tax:
Undistributed utilities |  | Ps | 3,089,012 |
Tax rate |  |  | 30 | %
Deferred income tax liabilities unrecognized with the previous temporary differences |  | Ps | 926,704 |
This tax could be subject to a more thorough revision, as well as the application of tax treaties existing in the countries of origin.

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