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Income tax incurred and deferred: | 12 Months Ended
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Dec. 31, 2017
Income taxes [Abstract] |
Disclosure of income tax [text block] | Note 14 - Income tax incurred and deferred:
a. | Income Tax (IT)
Mexico: In 2016 and 2017, the Company determined tax profits in its subsidiaries in the amounts of Ps5,051,189 and Ps.6,358,687, respectively. In 2017 and 2016, the tax profits were partially offset with the amortization of tax losses in the amounts of Ps.93,975 and Ps.86,083, respectively. At December 31, 2016 and 2017, the subsidiaries that have not been assessed income tax due to the tax loss carryforwards, are Cozumel, Minatitlan and Tapachula. Taxable income differs from 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 IT Law 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 Ps.77,551, 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 of Ps.48,877, and a presumptive income on liquid equity, which results from applying the 3% rate on the fiscal liquid equity of the previous year, of Ps.23,462 annual. The Company is subject to income taxes in Colombia of 34% plus a 6% surcharge on liquid income less COP800,000. The Company determined an income tax of Ps.16,618 and an additional surcharge tax of Ps.2,933 for the aforementioned period. 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%. The tax reform establishes that the tax rate applicable for the year 2018 and subsequent years is 33% of the taxable income. The analysis of deferred tax assets and liabilities is as follows:
|  | December 31, |
Deferred tax asset: |  | 2016 |  | 2017 |
Deferred tax recoverable within the following 12 months |  | Ps | 30,615 |  | Ps | 73,710 |
Deferred tax recoverable after 12 months |  |  | 33,930 |  |  | 253,010 |
Recoverable asset tax |  |  | 152,785 |  |  |  |
|  |  | 217,330 |  |  | 327,020 |
Deferred tax liability: |  |  |  |  |  |  |
Deferred tax payable after 12 months |  |  | (1,673,350) |  |  | (3,360,950) |
Deferred tax liability - Net |  | Ps | (1,456,020) |  | Ps | (3,033,930) |
The IT provision at December 31, 2015, 2016 and 2017 is as follows: Mexico:
|  | 2015 |  | 2016 |  | 2017 |
Current IT |  | Ps | 1,198,273 |  | Ps | 1,502,976 |  | Ps | 1,908,646 |
Deferred IT |  |  | (103,410) |  |  | (101,792) |  |  | (312,091) |
IT provision |  | Ps | 1,094,863 |  | Ps | 1,401,184 |  | Ps | 1,596,555 |
Aerostar: |  |  |  |  |  |  |  |  |  |
IT deferred for the period from June 1 |  |  |  |  |  |  |  |  |  |
to December 31, 2017 |  | Ps |  |  | Ps |  |  | Ps | 28,678 |
Airplan: |  |  |  |  |  |  |  |  |  |
Current IT |  | Ps |  |  | Ps |  |  | Ps | 19,551 |
Deferred IT |  |  |  |  |  |  |  |  | (9,337) |
IT Provision Airplan for the period |  |  |  |  |  |  |  |  |  |
October 19, to December 31, 2017 |  | Ps |  |  | Ps |  |  | Ps | 10,214 |
Total IT provision |  | Ps | 1,094,863 |  | Ps | 1,401,184 |  | Ps | 1,635,447 |
The reconciliation between the statutory and effective income tax rates is shown below:
|  | 2015 |  |  | 2016 |  |  | 2017 |
Consolidated income before IT and joint venture equity method: |  | Ps | 3,962,934 |  |  | Ps | 4,887,130 |  |  | Ps | 8,498,889 |
Plus (Less): |  |  |  |  |  |  |  |  |  |  |  |
Net income before taxes of Airplan and Aerostar |  |  | 16,011 |  |  |  |  |  |  |  |  |
Net income before taxes of subsidiaries in Mexico not subject to IT |  |  | (118,981) |  |  |  | (56,415) |  |  |  | (62,327) |
Income before provisions for income taxes |  |  | 3,843,953 |  |  |  | 4,830,715 |  |  |  | 8,452,573 |
Statutory IT rate |  |  | 30 | % |  |  | 30 | % |  |  | 30 | %
IT that would result from applying the IT rate to book profit before income taxes |  |  | 1,153,186 |  |  |  | 1,449,214 |  |  |  | 2,535,772 |
Non-deductible items and other permanent differences |  |  | 8,095 |  |  |  | 11,908 |  |  |  | 8,693 |
Gain on business combination |  |  | (2,108,760) |  |  |  |  |  |  |  |  |
Goodwill impairment |  |  | 1,415,729 |  |  |  |  |  |  |  |  |
Annual adjustment for tax inflation |  |  | (10,924) |  |  |  | (10,974) |  |  |  | (2,406) |
Temporary differences |  |  | (56,156) |  |  |  | (91,928) |  |  |  | (249,336) |
Recognition of deferred income tax at the Huatulco Airport (1) |  |  |  |  |  |  | 44,020 |  |  |  |  |
Initial recognition for deferred IT consolidation in Aerostar (2) |  |  |  |  |  |  |  |  |  |  | 28,678 |
Initial recognition for IT consolidation in Airplan (2) |  |  |  |  |  |  |  |  |  |  | 10,214 |
Other |  |  | 662 |  |  |  | (1,056) |  |  |  | (3,137) |
IT provision |  | Ps | 1,094,863 |  |  | Ps | 1,401,184 |  |  | Ps | 1,635,447 |
Effective ISR rate |  |  | 28 | % |  |  | 29 | % |  |  | 19 | %
| (1) | Based on the tax projections at December 31, 2016, 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, 2017, 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 on |
|  | December 31, |
|  | 2016 |  | 2017 |
Current deferred income tax: |  |  |  |  |  |  |
Advances (Airplan) |  | Ps |  |  | Ps | 25,271 |
Accrued liabilities |  |  | 30,615 |  |  | 48,439 |
Current deferred income tax asset |  |  | 30,615 |  |  | 73,710 |
Non-current deferred income tax: |  |  |  |  |  |  |
Bank loan’s fair value |  |  | 208,394 |  |  |  |
Allowance for doubtful accounting |  |  | 33,930 |  |  | 44,916 |
Non-current deferred income tax asset |  |  | 33,930 |  |  | 253,310 |
Deferred income tax asset |  |  | 64,545 |  |  | 327,020 |
Non-current deferred income tax liability: |  |  |  |  |  |  |
Fixed assets and concession (*) |  |  | (1,672,641) |  |  | (2,900,893) |
Deferred income (Airplan) |  |  |  |  |  | (458,682) |
Amortization of deferred expenses |  |  | (709) |  |  | (1,375) |
Non-current deferred income tax liability |  |  | (1,673,350) |  |  | (3,360,950) |
Total deferred income tax, net |  |  | (1,608,805) |  |  | (3,033,930) |
Recoverable asset tax |  |  | 152,785 |  |  |  |
Deferred income tax liability, net |  | Ps | (1,456,020) |  | Ps | (3,003,930) |
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 Ps.808,894 and Ps.861,483, respectively, due to the temporary difference between accounting and tax amortization rates.
| (*) | Includes Ps.267,307 and Ps.357,563 from Aerostar and Airplan only in, 2017.
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 December 31, 2015 |  | 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 |
| b. | Return of Asset Tax (AT) in accordance with the Law on Flat Rate Business Tax (LIETU) in Mexico.
AT in excess of IT 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 IT paid in the period and the AT paid in the previous three years, whichever is lower, in accordance with the Flat Tax Law, when IT incurred is higher than AT in any of those years, and it is subject to restatement through the application of “National Index Consumer Prices” Mexican factors. The last year that the AT can be recovered is 2017. In 2017 the Company recovered AT of Ps.211,675 and Ps.50,716 in 2016, with recognition in the results of 2017 as income Ps.58,890. In 2015, 2016 and 2017, AT of Ps.5,259, Ps.932 and Ps.932, 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 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, 2016 and 2017, the tax credits are as follows:
|  | December 31, |
|  | 2016 |  | 2017 |
Income tax |  | Ps | 101,664 |  | Ps | 74,885 |
Asset tax (*) |  |  | 10,074 |  |  | 8,006 |
|  | Ps | 111,738 |  | Ps | 82,891 |
(*) The balance as of December 31, 2017, was requested in return, at the date of this financial statements issuance said balance has not yet been recovered. Aerostar Tax loss Carry forwards: At December 31, 2017, the 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 |  |  |  |  |  |  |  | expiration |
2012 |  | USD | 9,201 |  | Ps. | 180,892 |  | 2027 |
2013 |  |  | 52,946 |  |  | 1,040,916 |  | 2028 |
2014 |  |  | 33,424 |  |  | 657,116 |  | 2029 |
2015 |  |  | 44,188 |  |  | 868,736 |  | 2030 |
2016 |  |  | 58,365 |  |  | 1,147,456 |  | 2031 |
Total |  | USD | 198,124 |  | Ps. | 3,895,118 |  |  |

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